AQ_GEN_PLNG_20221219_SIP_O3-NAAQS_App A Cln

Appendix A
On-road Mobile Source Emissions
Inventory Documentation

FINAL

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On-road Mobile Source Inventory Documentation i
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
TABLE OF CONTENTS
1.0 INTRODUCTION AND SCOPE ................................................................................................. 1
2.0 OVERALL METHODOLOGY .................................................................................................... 2
2.1 INTERAGENCY CONSULTATION ...................................................................................... 2
2.2 EMISSIONS INVENTORY YEARS ....................................................................................... 2
2.3 MOTOR VEHICLE EMISSIONS BUDGET AREAS ............................................................ 3
2.4 EMISSIONS MODELING APPROACH ................................................................................. 3
3.0 QUALITY ASSURANCE MEASURES ...................................................................................... 4
4.0 DISCUSSION OF MOBILE SOURCE EMISSIONS MODELING ........................................... 5
4.1 INTRODUCTION AND SCOPE ............................................................................................. 5
4.2 MOVES MODEL INPUTS ...................................................................................................... 5
4.2.1 ON-ROAD VEHICLE SPEED DATA .............................................................................. 5
4.2.2 VEHICLE AGE DISTRIBUTION .................................................................................. 16
4.2.3 VEHICLE MIX DATA .................................................................................................... 17
4.2.4 DISAGGREGATING STATE SPECIFIC VEHICLE MIX DATA FOR MOVES ........ 20
4.2.5 VEHICLES/EQUIPMENT: ON-ROAD VEHICLE EQUIPMENT ............................... 20
4.2.6 ROAD TYPE ................................................................................................................... 20
4.2.7 POLLUTANTS AND PROCESSES ............................................................................... 21
4.2.8 TEMPERATURE AND RELATIVE HUMIDITY DATA ............................................. 21
4.2.9 SOURCE TYPE POPULATION ..................................................................................... 21
4.2.10 VEHICLE INSPECTION AND MAINTENANCE PROGRAM PARAMETERS ...... 24
4.2.11 REID VAPOR PRESSURE SPECIFICATIONS .......................................................... 24
4.2.12 DIESEL SULFUR CONTENT ...................................................................................... 25
4.2.13 FUEL SUPPLY AND FUEL FORMULATION ........................................................... 25
4.2.14 VMT DATA ................................................................................................................... 25
4.3 ESTIMATED EMISSIONS FROM ON-ROAD MOBILE SOURCES................................. 33
4.4 MOTOR VEHICLE EMISSIONS BUDGETS FOR CONFORMITY .................................. 34
5.0 MOVES INPUT DATA .............................................................................................................. 39
5.1 VEHICLE MIX DATA .......................................................................................................... 39
5.2 METEOROLOGICAL DATA ............................................................................................... 44
5.3 MOVES MODELING DATA FILES .................................................................................... 45

On-road Mobile Source Inventory Documentation ii
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
LIST OF TABLES
Table 2.3-1. Motor Vehicle Emissions Budget Area Boundaries ...................................................... 3
Table 4.2.1-1. Metrolina Regional Model Travel Periods ................................................................. 6
Table 4.2.1-2. Cabarrus County Speeds from Metrolina Regional Model ........................................ 7
Table 4.2.1-3. Gaston County Speeds from Metrolina Regional Model ........................................... 8
Table 4.2.1-4. Iredell County Speeds from Metrolina Regional Model ............................................ 9
Table 4.2.1-5. Lincoln County Speeds from Metrolina Regional Model ........................................ 10
Table 4.2.1-6. Mecklenburg County Speeds from Metrolina Regional Model ............................... 11
Table 4.2.1-7. Rowan County Speeds from Metrolina Regional Model ......................................... 12
Table 4.2.1-8. Union County Speeds from Metrolina Regional Model........................................... 13
Table 4.2.1-9. Example Speed Bin Fractions .................................................................................. 16
Table 4.2.3-1. North Carolina Vehicle Activity Summary by Functional Classification - 2013 .... 18
Table 4.2.3-2. North Carolina Vehicle Activity Summary by Functional Classification - 2019 .... 19
Table 4.2.9-1. MOVES Source Types and HPMS Vehicle Types .................................................. 22
Figure 4.2.9-1. Federal Highway Association Statistics Graph ....................................................... 23
Table 4.2.10-1. Inspection and Maintenance Program Parameters ................................................. 24
Table 4.2.14-1. Daily Vehicle Miles Traveled for Cabarrus County............................................... 26
Table 4.2.14-2. Daily Vehicle Miles Traveled for Gaston County .................................................. 27
Table 4.2.14-3. Daily Vehicle Miles Traveled for Iredell County ................................................... 28
Table 4.2.14-4. Daily Vehicle Miles Traveled for Lincoln County................................................. 29
Table 4.2.14-5. Daily Vehicle Miles Traveled for Mecklenburg County ........................................ 30
Table 4.2.14-6. Daily Vehicle Miles Traveled for Rowan County .................................................. 31
Table 4.2.14-7. Daily Vehicle Miles Traveled for Union County ................................................... 32
Table 4.3-1. On-road Mobile Source NOx Emissions by County ................................................... 33
Table 4.3-2. On-road Mobile Source VOC Emissions by County .................................................. 33
Table 4.4-1. Percent Increase to MVEB .......................................................................................... 36
Table 4.4-2. On-road Mobile Source NOx Emissions ..................................................................... 36
Table 4.4-3. On-road Mobile Source VOC Emissions .................................................................... 37
Table 4.4-4. Cabarrus-Rowan MPO MVEB* .................................................................................. 37
Table 4.4-5. Gaston-Cleveland-Lincoln MPO MVEB* .................................................................. 37
Table 4.4-6. Charlotte Regional TPO – Rocky River RPO MVEB*............................................... 38
Table 5.1-1. Vehicle Type Descriptions .......................................................................................... 39
Table 5.1-2. Facility (Roadway) Type Descriptions ........................................................................ 39
Table 5.1-3. 2014 North Carolina Vehicle Mix Data ...................................................................... 40
Table 5.1-4. 2015 North Carolina Vehicle Mix Data ...................................................................... 41
Table 5.1-5. 2018 North Carolina Vehicle Mix Data ...................................................................... 42
Table 5.1-6. 2020 and beyond North Carolina Vehicle Mix Data ................................................... 43
Table 5.2-1. Meteorological Data - KCLT Weather Station– July 2014 ......................................... 44
Table 5.3-1. MOVES Modeling Files Provided .............................................................................. 46

On-road Mobile Source Inventory Documentation iii
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area

LIST OF FIGURES
Figure 4.2.9-1. Federal Highway Association Statistics Graph ....................................................... 23

On-road Mobile Source Inventory Documentation 1
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
1.0 INTRODUCTION AND SCOPE
This appendix documents revisions to the motor vehicle emissions budgets (MVEBs) presented
in the maintenance plan for the Charlotte-Gastonia-Salisbury 2008 8-hour ozone marginal
nonattainment area (hereinafter referred to as the “Charlotte area”). The MVEBs being revised
were previously approved as recorded in the “Air Plan Approval; North Carolina; Revision to
Approved Motor Vehicle Emissions Budgets” (86 FR 47387, August 25, 2021). The MVEBs are
revised to be compatible with the latest EPA approved mobile source emissions model,
MOVES3, which was released on January 7, 2021, and was updated to MOVES3.0.3 on January
11, 2022. Revised MVEBs were developed by 1) creating new 2026 on-road and nonroad mobile
source emissions estimates with MOVES3, 2) recalculating the available safety margin based on
the updated 2026 mobile source emissions, and 3) allocating sufficient safety margin emissions
to the MVEBs. Revisions to the maintenance plan emissions inventories for other source sectors
were not required.
This appendix covers the process of calculating the revised MVEBs and available safety margin
emissions. Documentation is included for the on-road mobile source emissions modeling
procedures and resulting oxides of nitrogen (NOx) and volatile organic compound (VOC)
emissions inventories for the Charlotte area. Documentation for nonroad mobile source
emissions modeling and inventory development is included in Appendix B.

On-road Mobile Source Inventory Documentation 2
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
2.0 OVERALL METHODOLOGY
2.1 INTERAGENCY CONSULTATION
Interagency consultation meetings with all involved transportation partners, coordinated by the
North Carolina Division of Air Quality (DAQ), were held to develop the emissions inventory
development project plan and schedule. The primary transportation partners involved in the
Charlotte area redesignation interagency consultation process included the North Carolina
Department of Transportation (NCDOT), EPA, the Federal Highway Administration (FHWA),
the Charlotte Regional Transportation Planning Organization (CRTPO), the Cabarrus-Rowan
Metropolitan Planning Organization (CRMPO), the Gaston-Cleveland-Lincoln Metropolitan
Planning Organization (GCLMPO), the Rocky River Rural Planning Organization (RRRPO),
and the Charlotte Department of Transportation (CDOT). CDOT agreed to perform travel
demand modeling (TDM) using the latest version of the Metrolina Regional Model (MRM) to
provide the speed and vehicle miles traveled (VMT) data for the areas within the Charlotte area.
All planning organizations coordinated with CDOT to ensure that all planned transportation
projects were accurately represented in the TDM modeling. The NCDOT also provided vehicle
registration data and vehicle mix data for all Charlotte area counties.
The transportation partners agreed to the following general specifications for the inventory
development process.
2.2 EMISSIONS INVENTORY YEARS
The following emission inventory years were selected: 2014, 20150F
1, 2018, 2022, and 2026.
MVEBs were developed for 2014 and 2026.

1 The 2015 emissions inventories were developed to support the DAQ’s CAA Section 110(l) noninterference
demonstration for relaxing the Federal Reid vapor pressure (RVP) requirement from 7.8 pound per square inch (psi)
to 9.0 psi applicable to gasoline introduced into commerce from June 1 to September 15 of each year in
Mecklenburg and Gaston Counties. The EPA subsequently issued a direct final rule (80 FR 49164) on August 17,
2015, approving revisions to the rule (effective on October 16, 2015) to relax the summertime RVP requirement in
the two counties.

On-road Mobile Source Inventory Documentation 3
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
2.3 MOTOR VEHICLE EMISSIONS BUDGET AREAS
The transportation partners unanimously agreed to the development of MVEBs for areas
consistent with the jurisdictional boundaries of the metropolitan planning organizations and the
rural planning organizations (MPOs/RPOs) as shown in the Table 2.3-1.
Table 2.3-1. Motor Vehicle Emissions Budget Area Boundaries
MPO/RPO County Areas Included
CRTPO/RRRPO Iredell*, Mecklenburg, Union*
GCLMPO Gaston*, Lincoln*
CRMPO Cabarrus*, Rowan*
* Includes only the maintenance area portions of the county.
2.4 EMISSIONS MODELING APPROACH
Mobile source emissions were estimated by the methodologies suggested in the following EPA
guidance documents: draft Emissions Inventory Guidance for Implementation of Ozone and
Particulate Matter National Ambient Air Quality Standards (NAAQS) and Regional Haze
Regulations, (EPA encourages states to follow the recommendations in this draft guidance until
an updated version is released), Policy Guidance on the Use of MOVES2014 for State
Implementation Plan Development, Transportation Conformity, and Other Purposes (EPA-420-
B-14-008, July 2014), and Technical Guidance on the Use of MOVES2010 for Emission
Inventory Preparation in State Implementation Plans and Transportation Conformity (EPA-420-
B-10-023, April 2010).
The EPA guidance requires the use of the latest approved mobile source emissions model. To
model emissions for years 2014, 2015, 2018, and 2022, the DAQ used the MOVES2014 version
of the MOtor Vehicle Emissions Simulator (MOVES), which was released on October 23, 2014.
To model the current updates to the 2026 emissions, the DAQ used the latest version of
MOVES3, MOVES3.0.3, released on January 11, 2022. The guidance also recommends using
local input data in lieu of the MOVES default data to more accurately represent local vehicle
fleet and emissions characteristics. The DAQ used local data wherever possible as described in
Section 4.2 of this appendix.
MOVES-based emission inventories were developed for the maintenance plan base year (2014),
the plan interim years (2018, 2022), and the plan future year (2026). As previously noted in
footnote 1, emission inventories for 2015 were also generated. Each inventory represents the
estimated emissions for a typical summer day, specifically a July weekday.

On-road Mobile Source Inventory Documentation 4
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
3.0 QUALITY ASSURANCE MEASURES
The detailed quality assurance and quality control procedures and measures, as outlined in the
DAQ’s Emissions Inventory Quality Assurance Project Plan (QAPP) and approved by EPA,
were applied to ensure the data meets specific data indicator goals and objectives. All raw data
used to generate MOVES model inputs, such as speed and VMT values, were checked for
reasonableness against historical data from the same data category and geographic area (county
or state). All manual data entries were checked by a second party. All automated calculations
and data processing operations performed by spreadsheet macros and database queries were
validated by comparison to hand calculated results. All MOVES input file development and
quality assurance activities were logged in a project design spreadsheet.

On-road Mobile Source Inventory Documentation 5
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
4.0 DISCUSSION OF MOBILE SOURCE EMISSIONS MODELING
On-road mobile sources produce NOx, and VOC, along with a host of other pollutants.
Emissions of these two pollutants are estimated in the on-road mobile source inventory for the
maintenance plan. The objective of the following section is to describe the source category, the
input files, and the emissions estimation procedures. This section also includes tables
summarizing the estimated emissions for the projection years by county.
4.1 INTRODUCTION AND SCOPE
On-road mobile sources are defined as those vehicles that travel on public roadways. Emissions
from motor vehicles occur throughout the day while the vehicle is in motion, at idle, parked, and
during refueling. All of these emissions processes need to be estimated in order to properly
reflect the total emissions from this source category.
4.2 MOVES MODEL INPUTS
All input data for MOVES modeling is first compiled into county-level MySQL databases which
include separate tables for each type of input data needed. Output data from MOVES modeling
runs are also created as MySQL databases. Due to their size and complexity, the MOVES input
and output database files will be provided electronically.
4.2.1 ON-ROAD VEHICLE SPEED DATA
Emissions modeling using MOVES requires vehicle speed input data formatted as fractions of
vehicle hours traveled (VHT) in each of 16 speed ranges, called “speed bins”, for each
combination of clock hour/day type (week day or weekend day), vehicle type, and road type.
Speed Bin 1 represents speeds from 0 to 2.5 miles per hour (mph), and Speed Bin 16 represents
speeds of 72.5 mph and greater. Speed Bins 2 through 15 each represent 5 mph speed ranges
between 2.5 mph and 72.5 mph. The fractions for each combination of vehicle type, road type,
and hour/day type sum to one. To generate these average speed distribution input tables, the
DAQ used spreadsheet-based data converters developed by EPA to process the speed and VMT
data provided by CDOT.
Raw Speed Data
CDOT provided the speed and VMT data covering all of Mecklenburg County and the portions
of the Charlotte non-attainment area within Cabarrus, Gaston, Iredell, Lincoln, Rowan and Union
counties. The data were categorized by roadway functional class as defined in the FHWA

On-road Mobile Source Inventory Documentation 6
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Highway Performance Monitoring System (HPMS). The data are also categorized by the four
travel periods used in the MRM, which are described in Table 4.2.1-1.
Table 4.2.1-1. Metrolina Regional Model Travel Periods
Travel Period Start Time Duration
AM Peak 6:00 AM – 9:00AM 3 hours
Midday 9:00 AM – 3:00PM 6 hours
PM Peak 3:00 PM - 6:00 PM 3 hours
Night 6:00 PM - 6:00 AM 12 hours

Tables 4.2.1-2 through 4.2.1-8 provide a summary of the MRM speed data.

On-road Mobile Source Inventory Documentation 7
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Table 4.2.1-2. Cabarrus County Speeds from Metrolina Regional Model
Travel Period Road Type 2014 2015 2018 2022 2026
AM Peak Rural Interstate 0.0 0.0 0.0 0.0 0.0
(6:00 AM - Rural Principal Arterial 28.9 27.8 27.0 25.4 45.8
9:00 AM) Rural Minor Arterial 30.2 29.3 28.9 27.1 52.7
Rural Major Collector 29.8 31.0 33.6 31.8 38.3
Rural Minor Collector 32.8 32.6 30.4 29.4 40.9
Rural Local 29.2 29.0 28.7 28.5 28.6
Urban Interstate 48.1 47.4 45.5 46.2 59.4
Urban Other Freeway/Xprway 51.1 54.5 53.1 51.7 0.0
Urban HOT/HOV 62.8 63.3 59.0 64.1 0.0
Urban Principal Arterial 24.4 24.8 23.8 22.7 30.4
Urban Minor Arterial 24.4 24.6 23.8 22.9 30.7
Urban collector 22.1 22.3 21.8 20.5 27.3
Urban Local 22.2 22.1 21.9 21.6 24.2
Midday Rural Interstate 0.0 0.0 0.0 0.0 0.0
Period Rural Principal Arterial 38.3 39.2 37.4 35.8 45.8
(9:00 AM - Rural Minor Arterial 38.5 37.8 35.6 34.5 53.5
3:00 PM) Rural Major Collector 37.1 35.9 39.7 38.7 40.1
Rural Minor Collector 37.1 37.2 34.9 33.4 40.7
Rural Local 29.0 28.8 28.7 28.5 28.0
Urban Interstate 58.1 56.4 55.1 55.2 66.2
Urban Other Freeway/Xprway 55.6 58.0 57.9 57.0 0.0
Urban HOT/HOV 65.4 65.1 55.7 63.6 0.0
Urban Principal Arterial 26.9 26.9 26.1 24.9 31.9
Urban Minor Arterial 26.5 26.5 25.9 24.7 31.3
Urban collector 25.7 25.5 24.8 23.6 29.1
Urban Local 22.4 22.3 22.1 21.9 23.1
PM Peak Rural Interstate 0.0 0.0 0.0 0.0 0.0
(3:00PM - Rural Principal Arterial 30.7 30.0 28.4 27.1 44.0
6:00 PM) Rural Minor Arterial 35.5 34.7 33.5 32.1 51.5
Rural Major Collector 29.9 28.4 31.9 32.0 35.6
Rural Minor Collector 31.5 31.9 30.1 28.1 39.1
Rural Local 29.1 29.1 28.8 28.4 28.4
Urban Interstate 43.8 45.3 43.6 45.3 57.5
Urban Other Freeway/Xprway 48.2 52.1 50.6 48.3 0.0
Urban HOT/HOV 65.1 64.7 51.7 59.8 0.0
Urban Principal Arterial 22.1 22.3 21.4 20.4 26.8
Urban Minor Arterial 22.4 22.7 21.9 20.9 27.2
Urban collector 21.1 21.3 20.7 19.3 24.5
Urban Local 20.9 20.9 20.7 20.4 23.4
Night Rural Interstate 0.0 0.0 0.0 0.0 0.0
Period Rural Principal Arterial 47.2 48.0 47.4 46.7 50.9
(6:00 PM - Rural Minor Arterial 45.5 45.4 44.4 45.1 54.2
6:00 AM) Rural Major Collector 47.4 47.1 46.9 46.8 46.8
Rural Minor Collector 43.1 43.3 42.7 42.2 45.3
Rural Local 28.9 28.8 28.7 28.8 28.3
Urban Interstate 60.6 60.7 62.5 60.0 66.4
Urban Other Freeway/Xprway 59.5 61.2 61.4 61.4 0.0
Urban HOT/HOV 0.0 66.4 48.9 52.7 0.0
Urban Principal Arterial 37.6 37.6 37.1 36.6 41.0
Urban Minor Arterial 36.7 36.8 36.4 35.8 38.8
Urban collector 35.9 36.3 36.1 35.5 38.5
Urban Local 24.7 24.5 24.6 24.6 25.2

On-road Mobile Source Inventory Documentation 8
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Table 4.2.1-3. Gaston County Speeds from Metrolina Regional Model
Travel Period Road Type 2014 2015 2018 2022 2026
AM Peak Rural Interstate 61.5 61.4 60.5 58.9 60.9
(6:00 AM - Rural Principal Arterial 57.2 57.1 57.1 56.9 62.7
9:00 AM) Rural Minor Arterial 38.9 36.5 35.4 33.3 34.8
Rural Major Collector 41.6 41.0 40.5 38.7 41.6
Rural Minor Collector 39.7 39.6 39.4 39.1 44.5
Rural Local 27.4 27.4 27.4 27.4 29.5
Urban Interstate 42.9 42.2 41.9 39.6 43.5
Urban Other Freeway/Xprway 42.6 42.9 42.4 42.0 38.5
Urban HOT/HOV 0.0 0.0 0.0 0.0 0.0
Urban Principal Arterial 30.2 29.8 29.5 28.5 30.4
Urban Minor Arterial 30.5 30.3 29.5 28.5 31.4
Urban collector 26.9 27.4 27.1 26.6 27.2
Urban Local 24.4 24.5 24.5 24.5 24.5
Midday Rural Interstate 62.9 62.8 62.7 62.4 61.4
Period Rural Principal Arterial 57.7 57.7 57.7 57.7 62.8
(9:00 AM - Rural Minor Arterial 50.5 49.5 48.3 47.1 45.7
3:00 PM) Rural Major Collector 47.3 46.9 46.6 45.7 47.5
Rural Minor Collector 40.6 40.7 40.6 40.6 46.3
Rural Local 27.0 27.0 27.0 27.1 28.5
Urban Interstate 60.9 60.6 59.7 57.9 59.8
Urban Other Freeway/Xprway 48.0 47.7 47.3 46.8 44.9
Urban HOT/HOV 0.0 0.0 0.0 0.0 0.0
Urban Principal Arterial 33.3 33.3 32.9 32.1 32.4
Urban Minor Arterial 34.5 34.4 33.9 33.1 34.2
Urban collector 28.1 27.4 28.1 27.3 27.9
Urban Local 24.2 24.3 24.2 24.2 23.7
PM Peak Rural Interstate 57.2 56.7 54.6 51.0 60.9
(3:00PM - Rural Principal Arterial 57.3 57.3 57.3 57.2 62.6
6:00 PM) Rural Minor Arterial 40.2 38.1 36.4 34.7 33.4
Rural Major Collector 41.3 40.7 40.1 39.2 40.6
Rural Minor Collector 39.3 39.1 38.8 38.4 44.4
Rural Local 27.9 28.0 28.0 28.1 29.4
Urban Interstate 40.9 39.6 39.3 36.5 40.5
Urban Other Freeway/Xprway 47.1 47.5 47.2 46.5 38.6
Urban HOT/HOV 0.0 0.0 0.0 0.0 0.0
Urban Principal Arterial 28.1 28.0 27.6 26.2 28.2
Urban Minor Arterial 30.5 30.2 29.7 28.7 29.4
Urban collector 25.5 25.2 25.5 25.2 25.8
Urban Local 24.3 24.3 24.2 24.1 24.3
Night Rural Interstate 63.0 63.0 63.0 63.0 61.4
Period Rural Principal Arterial 57.7 57.7 57.7 57.7 62.7
(6:00 PM - Rural Minor Arterial 56.1 55.7 55.4 54.8 58.6
6:00 AM) Rural Major Collector 50.5 50.4 50.5 50.6 49.2
Rural Minor Collector 41.0 41.0 41.1 41.1 46.3
Rural Local 27.0 27.0 27.0 27.0 28.1
Urban Interstate 63.0 63.0 63.0 63.0 61.2
Urban Other Freeway/Xprway 53.0 53.0 52.9 52.7 52.9
Urban HOT/HOV 0.0 0.0 0.0 0.0 0.0
Urban Principal Arterial 39.3 39.2 39.0 38.6 36.9
Urban Minor Arterial 40.1 40.1 39.9 39.5 37.9
Urban collector 31.9 31.3 33.4 33.1 33.7
Urban Local 24.4 24.5 24.4 24.4 24.5

On-road Mobile Source Inventory Documentation 9
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Table 4.2.1-4. Iredell County Speeds from Metrolina Regional Model
Travel Period Road Type 2014 2015 2018 2022 2026
AM Peak Rural Interstate 63.2 62.3 60.1 55.2 46.9
(6:00 AM - Rural Principal Arterial 0.0 0.0 0.0 0.0 0.0
9:00 AM) Rural Minor Arterial 12.2 11.9 11.6 11.3 14.0
Rural Major Collector 36.0 35.8 34.4 33.6 33.6
Rural Minor Collector 30.5 30.4 28.9 28.0 25.8
Rural Local 28.6 28.6 28.5 28.3 28.9
Urban Interstate 55.6 53.4 50.1 53.9 53.5
Urban Other Freeway/Xprway 0.0 0.0 0.0 0.0 0.0
Urban HOT/HOV 0.0 0.0 0.0 68.6 66.6
Urban Principal Arterial 28.1 28.4 27.2 25.9 22.8
Urban Minor Arterial 28.9 28.6 27.8 27.0 28.1
Urban collector 30.0 30.0 29.3 28.3 24.4
Urban Local 24.7 24.7 24.4 24.2 24.2
Midday Rural Interstate 68.0 67.9 67.6 67.1 65.6
Period Rural Principal Arterial 0.0 0.0 0.0 0.0 0.0
(9:00 AM - Rural Minor Arterial 12.7 12.5 12.1 11.7 13.3
3:00 PM) Rural Major Collector 39.4 39.2 37.7 35.7 35.2
Rural Minor Collector 31.2 31.2 29.2 28.9 25.2
Rural Local 28.5 28.5 28.4 28.3 26.8
Urban Interstate 65.4 64.4 62.5 62.0 62.9
Urban Other Freeway/Xprway 0.0 0.0 0.0 0.0 0.0
Urban HOT/HOV 0.0 0.0 0.0 68.8 67.1
Urban Principal Arterial 29.3 29.2 28.3 27.0 23.1
Urban Minor Arterial 30.8 29.8 29.4 28.3 29.4
Urban collector 31.9 31.7 30.7 29.5 26.4
Urban Local 24.6 24.4 24.3 24.0 23.7
PM Peak Rural Interstate 60.6 59.2 56.2 49.1 47.8
(3:00PM - Rural Principal Arterial 0.0 0.0 0.0 0.0 0.0
6:00 PM) Rural Minor Arterial 10.8 10.4 9.9 9.5 13.1
Rural Major Collector 31.9 31.9 30.4 29.6 31.2
Rural Minor Collector 26.4 26.2 25.8 24.9 23.2
Rural Local 28.4 28.4 28.2 28.0 28.0
Urban Interstate 51.4 49.7 46.0 50.1 53.8
Urban Other Freeway/Xprway 0.0 0.0 0.0 0.0 0.0
Urban HOT/HOV 0.0 0.0 0.0 68.1 65.9
Urban Principal Arterial 25.5 25.3 24.4 23.3 20.9
Urban Minor Arterial 27.5 28.0 26.7 26.1 25.9
Urban collector 27.6 27.4 26.9 25.7 20.3
Urban Local 23.8 23.7 23.5 23.1 23.7
Night Rural Interstate 68.2 68.2 68.2 68.2 66.5
Period Rural Principal Arterial 0.0 0.0 0.0 0.0 0.0
(6:00 PM - Rural Minor Arterial 25.1 24.7 23.2 21.9 21.8
6:00 AM) Rural Major Collector 47.7 47.6 47.4 47.0 43.8
Rural Minor Collector 44.2 44.1 43.9 43.9 40.3
Rural Local 28.9 28.8 28.8 28.9 29.5
Urban Interstate 68.2 68.2 68.2 68.2 66.3
Urban Other Freeway/Xprway 0.0 0.0 0.0 0.0 0.0
Urban HOT/HOV 0.0 0.0 0.0 68.8 67.2
Urban Principal Arterial 37.4 37.5 37.0 36.4 34.7
Urban Minor Arterial 37.7 37.7 37.5 37.0 35.8
Urban collector 41.6 41.5 41.0 40.0 39.6
Urban Local 26.2 26.2 26.1 26.1 25.8

On-road Mobile Source Inventory Documentation 10
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Table 4.2.1-5. Lincoln County Speeds from Metrolina Regional Model
Travel Period Road Type 2014 2015 2018 2022 2026
AM Peak Rural Interstate 0.0 0.0 0.0 0.0 0.0
(6:00 AM - Rural Principal Arterial 45.0 45.4 45.3 45.1 42.8
9:00 AM) Rural Minor Arterial 39.2 38.6 37.1 36.5 41.6
Rural Major Collector 50.0 49.8 49.7 49.4 55.2
Rural Minor Collector 36.9 36.6 35.4 33.9 37.6
Rural Local 28.7 28.8 28.8 28.7 30.3
Urban Interstate 0.0 0.0 0.0 0.0 0.0
Urban Other Freeway/Xprway 68.2 68.2 68.2 68.2 66.5
Urban HOT/HOV 0.0 0.0 0.0 0.0 0.0
Urban Principal Arterial 37.0 36.3 35.0 34.3 38.4
Urban Minor Arterial 33.5 33.1 32.2 31.3 32.9
Urban collector 35.0 34.7 34.3 33.5 34.4
Urban Local 26.0 26.0 26.0 25.9 26.5
Midday Rural Interstate 0.0 0.0 0.0 0.0 0.0
Period Rural Principal Arterial 51.1 51.6 51.1 50.9 50.8
(9:00 AM - Rural Minor Arterial 40.4 40.4 39.5 38.5 43.8
3:00 PM) Rural Major Collector 51.2 51.1 51.0 50.9 55.1
Rural Minor Collector 41.6 41.2 40.4 39.2 39.4
Rural Local 28.7 28.7 28.7 28.6 29.1
Urban Interstate 0.0 0.0 0.0 0.0 0.0
Urban Other Freeway/Xprway 68.2 68.2 68.2 68.2 66.5
Urban HOT/HOV 0.0 0.0 0.0 0.0 0.0
Urban Principal Arterial 39.5 39.4 38.1 38.1 42.6
Urban Minor Arterial 36.7 36.7 36.1 35.3 34.3
Urban collector 36.6 36.6 36.5 36.3 36.9
Urban Local 26.1 26.1 26.1 26.0 25.9
PM Peak Rural Interstate 0.0 0.0 0.0 0.0 0.0
(3:00PM - Rural Principal Arterial 45.0 45.7 44.9 44.9 48.4
6:00 PM) Rural Minor Arterial 36.2 35.2 34.1 33.5 40.3
Rural Major Collector 49.9 49.7 49.3 49.1 55.3
Rural Minor Collector 39.4 38.7 37.9 37.2 38.5
Rural Local 29.0 28.9 28.7 28.6 30.0
Urban Interstate 0.0 0.0 0.0 0.0 0.0
Urban Other Freeway/Xprway 68.2 68.2 68.2 68.2 66.5
Urban HOT/HOV 0.0 0.0 0.0 0.0 0.0
Urban Principal Arterial 36.0 36.0 34.3 33.4 38.7
Urban Minor Arterial 33.2 33.2 32.5 31.7 31.8
Urban collector 34.2 34.0 33.7 33.2 35.7
Urban Local 25.7 25.7 25.7 25.6 26.3
Night Rural Interstate 0.0 0.0 0.0 0.0 0.0
Period Rural Principal Arterial 59.6 59.7 59.6 59.8 59.7
(6:00 PM - Rural Minor Arterial 47.7 47.6 47.0 46.4 50.7
6:00 AM) Rural Major Collector 52.2 52.2 52.2 52.3 54.8
Rural Minor Collector 45.7 45.8 45.5 45.0 44.0
Rural Local 28.9 28.8 28.8 28.8 29.6
Urban Interstate 0.0 0.0 0.0 0.0 0.0
Urban Other Freeway/Xprway 68.2 68.2 68.2 68.2 66.5
Urban HOT/HOV 0.0 0.0 0.0 0.0 0.0
Urban Principal Arterial 45.6 45.4 43.9 43.3 45.7
Urban Minor Arterial 43.8 43.9 43.7 43.2 43.1
Urban collector 39.1 39.1 39.1 39.0 38.2
Urban Local 26.9 27.0 27.0 27.0 26.4

On-road Mobile Source Inventory Documentation 11
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Table 4.2.1-6. Mecklenburg County Speeds from Metrolina Regional Model
Travel Period Road Type 2014 2015 2018 2022 2026
AM Peak Rural Interstate 0.0 0.0 0.0 0.0 0.0
(6:00 AM - Rural Principal Arterial 28.9 27.8 27.0 25.4 19.8
9:00 AM) Rural Minor Arterial 30.2 29.3 28.9 27.1 30.2
Rural Major Collector 29.8 31.0 33.6 31.8 36.5
Rural Minor Collector 32.8 32.6 30.4 29.4 30.8
Rural Local 29.2 29.0 28.7 28.5 27.0
Urban Interstate 48.1 47.4 45.5 46.2 44.4
Urban Other Freeway/Xprway 51.1 54.5 53.1 51.7 44.9
Urban HOT/HOV 62.8 63.3 59.0 64.1 61.8
Urban Principal Arterial 24.4 24.8 23.8 22.7 19.4
Urban Minor Arterial 24.4 24.6 23.8 22.9 20.0
Urban collector 22.1 22.3 21.8 20.5 18.7
Urban Local 22.2 22.1 21.9 21.6 21.6
Midday Rural Interstate 0.0 0.0 0.0 0.0 0.0
Period Rural Principal Arterial 38.3 39.2 37.4 35.8 31.8
(9:00 AM - Rural Minor Arterial 38.5 37.8 35.6 34.5 38.4
3:00 PM) Rural Major Collector 37.1 35.9 39.7 38.7 41.6
Rural Minor Collector 37.1 37.2 34.9 33.4 30.8
Rural Local 29.0 28.8 28.7 28.5 26.7
Urban Interstate 58.1 56.4 55.1 55.2 52.3
Urban Other Freeway/Xprway 55.6 58.0 57.9 57.0 55.4
Urban HOT/HOV 65.4 65.1 55.7 63.6 63.2
Urban Principal Arterial 26.9 26.9 26.1 24.9 20.3
Urban Minor Arterial 26.5 26.5 25.9 24.7 21.3
Urban collector 25.7 25.5 24.8 23.6 20.5
Urban Local 22.4 22.3 22.1 21.9 21.0
PM Peak Rural Interstate 0.0 0.0 0.0 0.0 0.0
(3:00PM - Rural Principal Arterial 30.7 30.0 28.4 27.1 19.1
6:00 PM) Rural Minor Arterial 35.5 34.7 33.5 32.1 27.4
Rural Major Collector 29.9 28.4 31.9 32.0 33.0
Rural Minor Collector 31.5 31.9 30.1 28.1 27.2
Rural Local 29.1 29.1 28.8 28.4 25.5
Urban Interstate 43.8 45.3 43.6 45.3 39.1
Urban Other Freeway/Xprway 48.2 52.1 50.6 48.3 37.4
Urban HOT/HOV 65.1 64.7 51.7 59.8 54.6
Urban Principal Arterial 22.1 22.3 21.4 20.4 16.1
Urban Minor Arterial 22.4 22.7 21.9 20.9 16.6
Urban collector 21.1 21.3 20.7 19.3 15.9
Urban Local 20.9 20.9 20.7 20.4 20.2
Night Rural Interstate 0.0 0.0 0.0 0.0 0.0
Period Rural Principal Arterial 47.2 48.0 47.4 46.7 46.2
(6:00 PM - Rural Minor Arterial 45.5 45.4 44.4 45.1 44.9
6:00 AM) Rural Major Collector 47.4 47.1 46.9 46.8 45.4
Rural Minor Collector 43.1 43.3 42.7 42.2 38.4
Rural Local 28.9 28.8 28.7 28.8 28.6
Urban Interstate 60.6 60.7 62.5 60.0 60.0
Urban Other Freeway/Xprway 59.5 61.2 61.4 61.4 64.4
Urban HOT/HOV 0.0 66.4 48.9 52.7 64.9
Urban Principal Arterial 37.6 37.6 37.1 36.6 33.0
Urban Minor Arterial 36.7 36.8 36.4 35.8 32.1
Urban collector 35.9 36.3 36.1 35.5 32.9
Urban Local 24.7 24.5 24.6 24.6 24.5

On-road Mobile Source Inventory Documentation 12
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Table 4.2.1-7. Rowan County Speeds from Metrolina Regional Model
Travel Period Road Type 2014 2015 2018 2022 2026
AM Peak Rural Interstate 0.0 0.0 0.0 0.0 0.0
(6:00 AM - Rural Principal Arterial 56.5 56.7 56.5 56.3 57.9
9:00 AM) Rural Minor Arterial 54.9 54.9 54.7 54.2 58.9
Rural Major Collector 52.1 52.2 51.3 51.9 54.5
Rural Minor Collector 48.8 49.0 48.6 48.2 51.7
Rural Local 29.1 29.1 29.1 29.0 30.3
Urban Interstate 64.0 63.8 58.3 67.0 65.1
Urban Other Freeway/Xprway 0.0 0.0 0.0 0.0 0.0
Urban HOT/HOV 0.0 0.0 0.0 0.0 0.0
Urban Principal Arterial 41.4 41.4 41.2 40.8 41.1
Urban Minor Arterial 37.0 37.0 36.5 36.4 36.8
Urban collector 36.1 36.1 36.0 35.7 36.6
Urban Local 25.8 25.8 25.9 25.9 26.4
Midday Rural Interstate 0.0 0.0 0.0 0.0 0.0
Period Rural Principal Arterial 58.7 58.7 58.6 58.5 57.6
(9:00 AM - Rural Minor Arterial 57.0 56.9 56.6 56.0 59.8
3:00 PM) Rural Major Collector 54.3 54.2 53.8 53.7 55.3
Rural Minor Collector 50.1 50.1 50.1 50.0 52.2
Rural Local 28.8 28.8 28.8 28.8 28.9
Urban Interstate 66.7 66.6 66.2 67.1 65.1
Urban Other Freeway/Xprway 0.0 0.0 0.0 0.0 0.0
Urban HOT/HOV 0.0 0.0 0.0 0.0 0.0
Urban Principal Arterial 42.1 42.0 41.7 41.5 41.0
Urban Minor Arterial 37.7 37.5 37.4 37.1 37.1
Urban collector 36.4 36.4 36.4 36.1 37.1
Urban Local 25.5 25.5 25.5 25.6 25.2
PM Peak Rural Interstate 0.0 0.0 0.0 0.0 0.0
(3:00PM - Rural Principal Arterial 56.5 56.6 56.6 56.4 57.8
6:00 PM) Rural Minor Arterial 53.7 53.7 53.6 53.0 58.7
Rural Major Collector 51.2 51.0 49.9 51.0 54.6
Rural Minor Collector 48.5 48.4 47.7 47.6 51.4
Rural Local 29.1 29.1 29.1 29.1 30.2
Urban Interstate 62.1 61.6 53.7 66.5 65.3
Urban Other Freeway/Xprway 0.0 0.0 0.0 0.0 0.0
Urban HOT/HOV 0.0 0.0 0.0 0.0 0.0
Urban Principal Arterial 39.8 39.6 39.3 39.3 40.9
Urban Minor Arterial 35.9 35.9 35.5 34.9 36.4
Urban collector 34.7 34.7 34.7 34.1 36.5
Urban Local 25.6 25.6 25.7 25.7 26.1
Night Rural Interstate 0.0 0.0 0.0 0.0 0.0
Period Rural Principal Arterial 59.8 59.8 59.8 59.7 57.8
(6:00 PM - Rural Minor Arterial 60.1 60.2 60.1 60.0 60.4
6:00 AM) Rural Major Collector 56.8 56.8 56.7 56.6 56.7
Rural Minor Collector 50.9 50.9 50.9 51.1 52.4
Rural Local 29.1 29.1 29.0 29.1 29.5
Urban Interstate 67.0 67.0 67.0 67.1 65.2
Urban Other Freeway/Xprway 0.0 0.0 0.0 0.0 0.0
Urban HOT/HOV 0.0 0.0 0.0 0.0 0.0
Urban Principal Arterial 46.2 46.2 46.1 45.9 43.5
Urban Minor Arterial 43.2 43.2 43.2 43.0 41.2
Urban collector 39.9 39.9 39.8 39.8 39.5
Urban Local 25.8 25.8 25.8 26.0 26.4

On-road Mobile Source Inventory Documentation 13
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Table 4.2.1-8. Union County Speeds from Metrolina Regional Model
Travel Period Road Type 2014 2015 2018 2022 2026
AM Peak Rural Interstate 0.0 0.0 0.0 0.0 0.0
(6:00 AM - Rural Principal Arterial 51.6 51.6 53.8 53.4 60.3
9:00 AM) Rural Minor Arterial 44.0 44.1 44.6 42.0 39.0
Rural Major Collector 39.3 39.2 38.6 37.2 39.2
Rural Minor Collector 42.4 42.1 41.2 40.0 37.0
Rural Local 30.6 30.6 30.3 29.6 30.5
Urban Interstate 0.0 0.0 0.0 0.0 0.0
Urban Other Freeway/Xprway 31.9 31.3 44.7 42.7 58.6
Urban HOT/HOV 0.0 0.0 22.5 22.5 0.0
Urban Principal Arterial 30.4 30.4 34.8 34.0 35.5
Urban Minor Arterial 24.8 24.4 23.6 22.1 27.1
Urban collector 26.7 26.0 25.9 24.5 28.0
Urban Local 24.9 25.1 25.3 24.8 26.3
Midday Rural Interstate 0.0 0.0 0.0 0.0 0.0
Period Rural Principal Arterial 53.0 52.8 54.2 54.1 59.8
(9:00 AM - Rural Minor Arterial 47.7 46.3 48.7 45.6 41.8
3:00 PM) Rural Major Collector 43.0 42.8 42.2 40.8 40.8
Rural Minor Collector 44.2 43.9 43.0 42.1 38.4
Rural Local 30.9 30.9 30.9 30.4 29.8
Urban Interstate 0.0 0.0 0.0 0.0 0.0
Urban Other Freeway/Xprway 35.3 34.2 51.7 51.1 57.9
Urban HOT/HOV 0.0 0.0 22.5 22.5 0.0
Urban Principal Arterial 33.4 33.0 37.0 36.2 37.7
Urban Minor Arterial 27.2 26.7 25.9 24.8 28.2
Urban collector 29.4 28.5 28.2 27.0 29.6
Urban Local 25.8 25.8 26.1 25.7 26.5
PM Peak Rural Interstate 0.0 0.0 0.0 0.0 0.0
(3:00PM - Rural Principal Arterial 51.9 51.8 53.6 53.1 60.6
6:00 PM) Rural Minor Arterial 42.4 42.1 45.5 43.3 36.9
Rural Major Collector 39.3 39.0 38.8 37.2 36.8
Rural Minor Collector 41.4 41.0 39.3 38.6 33.7
Rural Local 30.8 30.8 30.5 29.8 29.4
Urban Interstate 0.0 0.0 0.0 0.0 0.0
Urban Other Freeway/Xprway 25.9 25.1 45.9 43.5 57.8
Urban HOT/HOV 0.0 0.0 22.5 22.5 0.0
Urban Principal Arterial 28.6 28.6 32.5 31.6 33.0
Urban Minor Arterial 22.5 22.3 21.1 19.7 23.9
Urban collector 24.1 23.5 23.5 22.3 24.8
Urban Local 24.8 24.9 25.2 24.6 25.4
Night Rural Interstate 0.0 0.0 0.0 0.0 0.0
Period Rural Principal Arterial 54.6 54.7 54.8 54.7 60.0
(6:00 PM - Rural Minor Arterial 53.1 53.0 51.8 48.9 46.8
6:00 AM) Rural Major Collector 48.5 48.3 48.2 47.8 47.6
Rural Minor Collector 49.3 49.1 48.3 48.0 44.9
Rural Local 32.0 32.1 32.8 32.7 32.4
Urban Interstate 0.0 0.0 0.0 0.0 0.0
Urban Other Freeway/Xprway 49.6 49.1 54.4 54.3 61.0
Urban HOT/HOV 0.0 0.0 22.5 22.5 0.0
Urban Principal Arterial 41.3 41.4 42.9 42.5 41.6
Urban Minor Arterial 38.6 38.9 37.9 37.4 37.6
Urban collector 41.2 40.8 40.7 40.3 39.5
Urban Local 28.0 28.1 28.0 27.9 27.7

On-road Mobile Source Inventory Documentation 14
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Average Speed Distribution Calculations
To generate the MOVES average speed distribution tables from the speed and VMT data
provided, the DAQ used spreadsheet-based tools (developed by the DAQ and EPA) to perform
the calculation procedures described below.
MOVES uses four different roadway type categories that are affected by the average speed
distribution input: rural restricted access, rural unrestricted access, urban restricted access, and
urban unrestricted access (these road types are discussed in more detail in Section 4.2.6). In
MOVES, local roadways are included with arterials and collectors in the urban and rural
unrestricted access roads category. In MOVES, EPA recommends that the average speed
distribution for local roadway activity be included as part of a weighted distribution of average
speed across all unrestricted roads along with the distribution of average speeds for arterials and
connectors.
When only a single average speed is available for a specific road type and that average speed is
not identical to the average speed in a particular speed bin, MOVES guidance stipulates that
users should apply the following formula for creating the appropriate speed distribution among
two adjacent speed bins.
The general formula is:
VHT Fraction A in Speed Bin with closest average speed lower than observed average speed +
VHT Fraction B in Speed Bin with closest average speed higher that observed average speed = 1
VHT Fraction A(low bin) = 1 – [(observed average speed – average speed of lower speed bin) /
(average speed of higher speed bin – average speed of lower speed bin)]
VHT Fraction B(high bin) = 1- [(average speed of higher speed bin – observed average speed) /
(average speed of higher speed bin – average speed of lower speed bin)]
Or more simply: VHT Fraction B = 1 – VHT fraction A
The following is an example of applying the above equations. If the single average speed for a
roadway is 58 mph, the average speed distribution will be split between the 55 and 60 mph speed
bins. The appropriate VHT fractions are found with the following equations:

On-road Mobile Source Inventory Documentation 15
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
VHT fraction A(low bin) = 1 – [(58 mph Avg. Speed – 55 mph (Bin Speed)) / (60 mph (Bin Speed)
– 55 mph (Bin Speed)] = 0.4
VHT fraction B(high bin) = 1 – [(60 mph (Bin Speed) – 58 mph Avg. Speed) / (60 mph (Bin Speed)
– 55 mph (Bin Speed)] = 0.6
VHT Fraction A(low bin) + VHT Fraction B(high bin) = 1
0.4 + 0.6 = 1
As stated above, MOVES uses only four different roadway types: rural restricted access, rural
unrestricted access, urban restricted access and urban unrestricted access. This means that the
speeds for multiple roadway types need to be combined into the appropriate speed bins. To
create the speed bin fractions for combined roadways, the VMT for each roadway is used to
weight the speed bin fraction. For example, below are speeds and VMT for urban restricted
access road types:
Road type Speed
(mph)
VMT
(hourly miles)
Urban Interstate 63 250,000
Urban Freeway 56 100,000
The first step is to determine the speed bin fractions for each road type separately. For the urban
interstate road type, the speed 63 is split between the MOVES speed bins of 60 and 65 as
described above, which results in the VHT fractions of 0.4 and 0.6 for speed bins 60 and 65,
respectively. Similarly, the speed for the urban freeway road type (56 mph) is split between the
MOVES speed bins of 55 and 60 and results in the VHT fractions of 0.8 and 0.2, respectively.
The next step requires road type VMT to weigh the VHT fractions so that the final MOVES
speed bin fractions can be developed. The VHT fractions, specific to the road type and speed
bin, are multiplied by the corresponding hourly VMT. These hourly totals are divided by the
total VMT for that hour for the road type category (in this example, urban restricted access
includes urban interstate and urban freeway). The following equation is used to calculate the
combined speed bin fractions:
𝑉𝐻𝑇(𝑅𝑝𝑑𝑑𝑑 𝐵𝑖𝑛 𝑋)= [∑(𝑉𝐻𝑇 𝐹𝑟𝑎𝑐𝑡�ℎ𝑛𝑛(𝑅𝑅)× �𝑛𝑡𝑟𝑙𝑦 𝑉𝑀𝑇(𝑅𝑅))] ÷ [∑�𝑛𝑡𝑟𝑙𝑦 𝑉𝑀𝑇(𝑅𝑅)]
where:
RT = the HPMS road type

On-road Mobile Source Inventory Documentation 16
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
In this example, the HPMS road types are urban interstate (UI) and urban freeway (UF) and the
speed bins are 55, 60 and 65. Table 4.2.1-9 summarizes the speed bin fractions for this example.
Table 4.2.1-9. Example Speed Bin Fractions
HPMS Road Type Speed Bin 55 Speed Bin 60 Speed Bin 65
Urban Interstate 0.0 0.4 0.6
Urban Freeway 0.8 0.2 0.0
Using the equation below, the final MOVES speed bin fractions are calculated for the urban
restricted access road type.
VHT(Speed Bin X) = [(VHT Fraction(UI) * hourly VMT(UI)) + (VHT Fraction(UF) * hourly VMT(UF))]
(hourly VMT(UI) + hourly VMT(UF))

VHT(Speed Bin 55) = [(0.0 * 250,000) + (0.8 * 100,000)]
(250,000 + 100,000)
VHT(Speed Bin 55) = 0.2286

VHT(Speed Bin 60) = [(0.4 * 250,000) + (0.2 * 100,000)]
(250,000 + 100,000)
VHT(Speed Bin 60) = 0.3428
VHT(Speed Bin 65) = [(0.6 * 250,000) + (0.0 * 100,000)]
(250,000 + 100,000)
VHT(Speed Bin 65) = 0.4286

The sum of the VHT fractions for all speed bins within a road type category must add up to 1.0.
The hourly VHT fractions by speed bin and road type are then processed through a MOVES
supplied converter to develop the speed distribution file by hour and road type.
4.2.2 VEHICLE AGE DISTRIBUTION
Local vehicle age distributions were developed from county-level annual registration data
obtained from the NCDOT. For this analysis, the age distribution was generated based on 2013
data. The data includes the number of registered vehicles categorized by nine vehicle types and
by model year, with individual model years listed from 2013 through 1974 and a combined
listing for all vehicles of model year 1973 and older. The vehicle count information is provided
for nine vehicle types; light duty gas vehicles (LDGV), light duty diesel vehicles (LDDV), light
duty gas trucks 1 (LDGT1), light duty gas trucks 2 (LDGT2), light duty diesel trucks 1
(LDDT1), light duty diesel trucks 2 (LDDT2), heavy duty gas vehicles (HDGV), heavy duty

On-road Mobile Source Inventory Documentation 17
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
diesel vehicles (HDDV) and motorcycles (MC). LDDT1 and LDDT2 are combined and labeled
as light duty diesel trucks (LDDT). The DAQ used a customized version of an EPA vehicle age
distribution data converter tool to convert the local county-level data to the appropriate age
distribution input tables for MOVES.
4.2.3 VEHICLE MIX DATA
Vehicle mix or VMT mix is used by MOVES to convert annual VMT to VMT by HPMS class,
VMT fractions by hour, and VMT by road type distribution. The vehicle mix is developed by
the same method used in MOBILE6.2, as outlined below. The resulting file is then used in a
MOVES supplied converter to develop the VMT by HPMS class, VMT fractions by hour, and
VMT by road type distribution.
The vehicle mix refers to the percentage of different vehicle types on each of the 12 FHWA road
types. These road types are listed above in the speed assumptions section. It is critical for
estimating on-road mobile emissions in an area to use data that accurately reflects the vehicles
types traveling on each of these different road types.
In August 2004, EPA released the guidance document EPA420-R-04-013, Technical Guidance
on the Use of MOBILE6.2 for Emission Inventory Preparation, which outlines how to convert
HPMS traffic count data to MOBILE6.2 vehicle mix data. Outlined below is the methodology
used to convert the 13 HPMS vehicle types count data reported to FHWA and generate a state
specific vehicle mix.
The North Carolina HPMS data used to generate the statewide vehicle mix was based on 2013
for the 2014, 2015, 2018, 2022 and 2026 modeling years. Table 4.2.3-1 shows the percent of
VMT per vehicle type for each of the 12 road classes.

On-road Mobile Source Inventory Documentation 18
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Table 4.2.3-1. North Carolina Vehicle Activity Summary by Functional Classification - 2013
Road Type Categories Vehicle Type Categories*
FC Code Functional Classification Samples MC Cars 2A4T Bus 2ASU 3ASU 4ASU 4AST 5AST 6AST 5AMT 6AMT 7AMT
1 Rural Principal Arterial – Interstate 24 0.0038 0.6953 0.1464 0.0059 0.0211 0.0062 0.0003 0.0095 0.1067 0.0019 0.0019 0.0008 0.0002
2 Rural Principal Arterial – Other 247 0.0065 0.6968 0.1914 0.0064 0.0278 0.0071 0.0007 0.0106 0.0493 0.0018 0.0009 0.0004 0.0003
6 Rural Minor Arterial 322 0.0058 0.7111 0.2005 0.0055 0.0267 0.0056 0.0005 0.0087 0.0335 0.0016 0.0001 0.0000 0.0003
7 Rural Major Collector 677 0.0072 0.6992 0.2142 0.0058 0.0286 0.0065 0.0006 0.0083 0.0282 0.0013 0.0000 0.0000 0.0002
8 Rural Minor Collector 15 0.0118 0.6818 0.2436 0.0040 0.0261 0.0062 0.0004 0.0057 0.0187 0.0015 0.0000 0.0000 0.0000
9 Rural Local System 49 0.0086 0.7178 0.2046 0.0090 0.0351 0.0103 0.0010 0.0055 0.0069 0.0011 0.0000 0.0000 0.0000
11
Urban Principal Arterial -
Interstate
38 0.0042 0.7577 0.1567 0.0047 0.0176 0.0055 0.0003 0.0041 0.0471 0.0005 0.0010 0.0005 0.0001
12
Urban Principal Arterial - Other
Freeways or Expressways
104 0.0054 0.7418 0.1722 0.0054 0.0214 0.0066 0.0007 0.0092 0.0348 0.0012 0.0008 0.0003 0.0002
14 Urban Principal Arterial - Other 430 0.0054 0.7719 0.1685 0.0048 0.0208 0.0057 0.0009 0.0054 0.0145 0.0015 0.0002 0.0001 0.0003
16 Urban Minor Arterial 305 0.0057 0.7736 0.1756 0.0042 0.0215 0.0044 0.0006 0.0049 0.0085 0.0008 0.0001 0.0000 0.0002
17 Urban Collector 28 0.0050 0.7878 0.1674 0.0049 0.0194 0.0052 0.0003 0.0044 0.0051 0.0004 0.0000 0.0000 0.0001
19 Urban Local System 20 0.0108 0.7175 0.1976 0.0099 0.0296 0.0130 0.0003 0.0055 0.0151 0.0006 0.0000 0.0002 0.0001

*MC - motorcycles
Cars – passenger cars
2A4T – trucks with two axles, 4 tires
Bus – intercity, transit, and school buses
2ASU – two axle single unit trucks
2ASU – three axle single unit trucks
4ASU – four axle single unit trucks
4AST – four axle single trailer truck
5AST – five axle single trailer truck
6AST – six axle single trailer truck
5MST – five axle multi-trailer truck
6AMT – six axle multi-trailer truck
7AMT – seven axle multi-trailer truck

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Table 4.2.3-2. North Carolina Vehicle Activity Summary by Functional Classification - 2019
Road Type Categories Vehicle Type Categories*
FC Code Functional Classification Samples MC Cars 2A4T Bus 2ASU 3ASU 4ASU 4AST 5AST 6AST 5AMT 6AMT 7AMT
1 Rural Principal Arterial – Interstate 47 0.0040 0.6865 0.1415 0.0054 0.0201 0.0063 0.0003 0.0102 0.1205 0.0013 0.0026 0.0012 0.0003
2 Rural Principal Arterial – Other 299 0.0047 0.6713 0.2142 0.0078 0.0330 0.0073 0.0008 0.0134 0.0434 0.0022 0.0009 0.0003 0.0005
6 Rural Minor Arterial 365 0.0056 0.6850 0.2191 0.0066 0.0323 0.0064 0.0006 0.0112 0.0312 0.0015 0.0001 0.0000 0.0003
7 Rural Major Collector 816 0.0065 0.6667 0.2370 0.0071 0.0343 0.0071 0.0008 0.0111 0.0277 0.0015 0.0000 0.0000 0.0002
8 Rural Minor Collector 22 0.0130 0.6525 0.2435 0.0067 0.0339 0.0066 0.0003 0.0087 0.0320 0.0020 0.0000 0.0000 0.0009
9 Rural Local System 55 0.0087 0.6771 0.2305 0.0111 0.0388 0.0097 0.0012 0.0072 0.0141 0.0013 0.0000 0.0000 0.0003
11
Urban Principal Arterial -
Interstate
92 0.0044 0.7516 0.1551 0.0047 0.0174 0.0054 0.0003 0.0046 0.0544 0.0006 0.0010 0.0005 0.0001
12
Urban Principal Arterial - Other
Freeways or Expressways
141 0.0050 0.7336 0.1818 0.0057 0.0231 0.0061 0.0006 0.0081 0.0332 0.0014 0.0007 0.0003 0.0003
14 Urban Principal Arterial - Other 568 0.0052 0.7635 0.1760 0.0057 0.0231 0.0058 0.0010 0.0057 0.0119 0.0016 0.0002 0.0001 0.0004
16 Urban Minor Arterial 342 0.0055 0.7566 0.1853 0.0051 0.0249 0.0056 0.0006 0.0057 0.0090 0.0012 0.0001 0.0000 0.0003
17 Urban Collector 33 0.0036 0.7828 0.1725 0.0049 0.0210 0.0041 0.0005 0.0045 0.0047 0.0011 0.0000 0.0000 0.0002
19 Urban Local System 24 0.0095 0.7343 0.1786 0.0155 0.0294 0.0101 0.0006 0.0057 0.0130 0.0023 0.0001 0.0001 0.0008

*MC - motorcycles
Cars – passenger cars
2A4T – trucks with two axles, 4 tires
Bus – intercity, transit, and school buses
2ASU – two axle single unit trucks
2ASU – three axle single unit trucks
4ASU – four axle single unit trucks
4AST – four axle single trailer truck
5AST – five axle single trailer truck
6AST – six axle single trailer truck
5MST – five axle multi-trailer truck
6AMT – six axle multi-trailer truck
7AMT – seven axle multi-trailer truck

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2008 8-Hour Ozone Marginal Nonattainment Area
4.2.4 DISAGGREGATING STATE SPECIFIC VEHICLE MIX DATA FOR MOVES
The procedures in Section 4.1.4 and 4.1.5 of the Technical Guidance on the Use of MOBILE6.2
for Emission Inventory Preparation were used to create vehicle mix tables used as inputs for
VMT converter applications provided by EPA. The procedures map the vehicle mixes shown in
Section 4.2.3 (12 roadway functional classes, 13 vehicle types) to the mix matrix required for the
VMT converter applications (12 roadway functional classes, 16 vehicle types). The process also
provides calculation of projected mixes for future years.
The resulting vehicle mix tables are presented in Section 5.1.
4.2.5 VEHICLES/EQUIPMENT: ON-ROAD VEHICLE EQUIPMENT
For MOVES emissions modeling, vehicle fleet characteristics must be specified from among 13
source use types and five different fuel types (gasoline, diesel, compressed natural gas (CNG),
ethanol, and electricity).
As per EPA guidance for state implementation plans (SIPs) and regional conformity analyses,
the DAQ selected the appropriate fuel and vehicle type combinations that reflect the full range of
vehicles that will operate in each county. All valid diesel, gasoline, CNG, ethanol, and electric
vehicle and fuel combinations were selected.
4.2.6 ROAD TYPE
The MOVES model defines five different road types to categorize the roadways used in a
particular MOVES modeling run. The five road types are:

• Off-Network (road type 1) – all locations where the predominant activity is vehicle starts,
parking and idling (parking lots, truck stops, rest areas, freight or bus terminals)
• Rural Restricted Access (2) – rural highways that can only be accessed by an on-ramp
• Rural Unrestricted Access (3) – all other rural roads (arterials, connectors, and local
streets)
• Urban Restricted Access (4) – urban highways or freeways that can only be accessed by
an on-ramp
• Urban Unrestricted Access (5) – all other urban roads (arterials, connectors, and local
streets).

The DAQ included all five road types in each modeling run as per EPA guidance. Including the
off-network road type was necessary in order to account for NOx and VOC exhaust emissions
from vehicle starts and extended idle activity, and VOC emissions from evaporative processes.

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4.2.7 POLLUTANTS AND PROCESSES
County-level emissions for a typical summer day, specifically a July weekday, were modeled for
each year of interest. Emissions from all processes that generate NOx or VOC, such as running
exhaust, start exhaust, and evaporative processes, were included to ensure that all emissions of
these pollutants from on-road sources were accounted for as required for SIPs or regional
conformity analyses.
4.2.8 TEMPERATURE AND RELATIVE HUMIDITY DATA
Local temperature and humidity data are required inputs for SIP and regional conformity
analyses with MOVES. For the Charlotte area on-road mobile source emission estimates, the
DAQ used the average July 2014 24-hour temperature profile from the Automated Surface
Observing System at the Charlotte Douglas International Airport. The temperature and relative
humidity profiles used in the MOVES input files are listed in section 5.2.
4.2.9 SOURCE TYPE POPULATION
Source type (i.e., vehicle type) population data are used within MOVES to calculate off-network
emissions, which include exhaust emissions from vehicle starts and evaporative emissions from
parked vehicles. Off-network emissions are based on both the number and type of vehicles in
the modeling domain. MOVES source type population input data consists of the number of each
of 13 types of vehicles within the modeled area, which is typically a single county. Descriptions
of the categories, which are subsets of the six HPMS vehicle classes, are shown in Table 4.2.9-1.
The DAQ developed source type population input tables from the latest available (2013) county-
level vehicle registration dataset described in Section 4.2.2. The original data was processed in
three steps to provide source type population data to accurately represent the correct source
types, geographic areas, and future years as described below.
Converting Source Type Categories
The DAQ used a customized spreadsheet tool, based on EPA source type distribution tools and
data, to convert the local county-level source type population data from nine vehicle types to the
required 13 MOVES source types. This is the same process that was used for the source type
age distribution data processing described in Section 4.2.2

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2008 8-Hour Ozone Marginal Nonattainment Area
Table 4.2.9-1. MOVES Source Types and HPMS Vehicle Types
Source Type ID Source Types used in MOVES HPMS Vehicle Class
11 Motorcycle Motorcycles
21 Passenger Car Passenger Cars
31 Passenger Truck Other 2 axle-4 tire vehicles
32 Light Commercial Truck Other 2 axle-4 tire vehicles
41 Intercity Bus Buses
42 Transit Bus Buses
43 School Bus Buses
51 Refuse Truck Single Unit Trucks
52 Single Unit Short-haul Truck Single Unit Trucks
53 Single Unit Long-haul Truck Single Unit Trucks
54 Motor Home Single Unit Trucks
61 Combination Short-haul Truck Combination Trucks
62 Combination Long-haul Truck Combination Trucks

Projecting Source Type Population Data to Future Years
For future year MOVES runs, it was necessary to project the source type population data for
each county. The DAQ has determined that growth in human population is a suitable indicator
of growth in vehicle ownership. This is illustrated in the FHWA Highway Statistics graph of
Licensed Drivers, Vehicle Registrations, and Resident Population shown in Figure 4.2.9-1.

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2008 8-Hour Ozone Marginal Nonattainment Area
Figure 4.2.9-1. Federal Highway Association Statistics Graph
The EPA has also indicated that using human population growth as a surrogate to project vehicle
population growth is acceptable. To forecast future year vehicle populations, a reliable source of
county population was needed. To ensure consistency, the same future year human population
estimates used in the MRM TDM modeling were used to project county-level source type
population data. An example of how a 2013 vehicle population was grown to 2018 based on this
surrogate of projected county population follows:
Vehicle Pop 2018 = Vehicle Pop 2013 * (Human Pop 2018/ Human Pop 2013)
Scaling Source Type Population Data to Partial County Areas
The maintenance area only partially covers six of the seven Charlotte area counties. To
accurately reflect the source type populations in these partial county areas, the total county
source type populations were scaled based on the ratio of the human population within the
maintenance area of the county to the whole county population, as shown in the following
equation:
Vehicle Pop partial county = Vehicle Pop whole county * (Human Pop partial county / Human Pop whole county)
The human population data from the MRM TDM modeling was also used for these calculations.

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2008 8-Hour Ozone Marginal Nonattainment Area
4.2.10 VEHICLE INSPECTION AND MAINTENANCE PROGRAM PARAMETERS
In 2002, North Carolina implemented a vehicle emissions inspection and maintenance (I&M)
program based on vehicle onboard diagnostics (OBDII). This program initially covered all light
duty gasoline powered vehicles (designated in MOVES as source type IDs 21, 31, and 32) that
are model year 1996 and newer. The program was initially implemented in 9 counties and was
expanded to include a total of 48 counties between July 2002 and January 2006. Cabarrus,
Gaston, Mecklenburg, and Union were phased-in July 1, 2002 followed by Iredell and Rowan
Counties in July 1, 2003 and Lincoln County in January 1, 2004.
All MOVES modeling runs were executed with the appropriate I&M program parameters to
properly account for the emissions reductions resulting from implementation of the program.
The magnitude of the reductions is scaled by the I&M compliance factor parameters, which are
calculated based on I&M compliance rates and waiver rates. The vehicle model years covered
by the program must also be specified, as well as the number of latest model years of vehicles to
exclude from the I&M program testing requirements. These four parameters (I&M compliance
rate, waiver rate, model years covered, and number of model years excluded) are defined in the
North Carolina I&M SIP. North Carolina state law has dictated changes to the I&M program
model year exemptions and model year coverage in recent years. Table 4.2.10-1 lists the I&M
program parameters applicable for specific emissions inventory years.
Table 4.2.10-1. Inspection and Maintenance Program Parameters
Inventory
Year
Compliance
Rate
Waiver
Rate
Vehicle Model
Years Covered
Number of Latest
Model Years Exempted
2014 95% 5% 1996 and newer 1
2015 96% 5% 1996 and newer 3*
2018 - 2026 96% 5% 20 latest model years 3*
* Vehicles from the 3 latest model years with 70,000 or more odometer miles are not exempted
4.2.11 REID VAPOR PRESSURE SPECIFICATIONS
Reid vapor pressure (RVP) is a measurement of gasoline volatility. The use of lower RVP
gasoline leads to lower VOC emissions from gasoline handling and evaporative VOC emissions
from motor vehicles. Gasoline with an RVP of 9.0 psi is required during May through
September 15 for all North Carolina counties.

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4.2.12 DIESEL SULFUR CONTENT
All diesel fuel formulations used the default diesel fuel sulfur content values, which are within
the ultra-low sulfur diesel limit of 15 parts per million (ppm).
4.2.13 FUEL SUPPLY AND FUEL FORMULATION
MOVES default fuel supply and fuel formulation data are categorized by fuel region ID –
counties with the same fuel region ID have the same fuel supply and formulation for a given
year. All North Carolina counties are covered by a single fuel region ID – 100000000. The
default fuel supply and fuel formulations for fuel region 100000000 were used for all model
runs.
4.2.14 VMT DATA
The Charlotte area VMT data for years 2014, 2015, 2018, and 2022 were generated by CDOT
using the MRM14v1.0 travel demand model and were provided to the DAQ on November 11,
2014. VMT data for 2026 were generated using MRM22v1.0. The MRM modeling incorporated
the latest available socioeconomic, population and highway planning data.
Tables 4.2.14-1 through 4.2.14-7 list the VMT data for all Charlotte area counties. The values
represent the average annual daily vehicle miles traveled (AADVMT) for the specified
county/road type/travel period designation.

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2008 8-Hour Ozone Marginal Nonattainment Area
Table 4.2.14-1. Daily Vehicle Miles Traveled for Cabarrus County
Travel Period Road Type 2014 2015 2018 2022 2026
AM Peak Rural Interstate 0 0 0 0 0
(6:00 AM - Rural Principal Arterial 30,008 29,864 30,750 32,178 31,123
9:00 AM) Rural Minor Arterial 53,118 55,011 57,188 63,727 68,616
Rural Major Collector 92,043 91,499 95,597 98,566 105,803
Rural Minor Collector 59,330 58,208 60,731 67,815 78,982
Rural Local 106,084 110,564 126,516 149,925 147,583
Urban Interstate 345,872 357,449 437,117 479,242 478,652
Urban Other Freeway/Xprway 0 0 0 0 0
Urban HOT/HOV 0 0 0 0 0
Urban Principal Arterial 183,464 187,467 190,147 201,121 188,248
Urban Minor Arterial 183,378 183,274 200,855 219,417 210,386
Urban collector 137,484 138,991 142,514 153,838 174,224
Urban Local 197,979 197,570 212,227 235,814 240,733
Midday Rural Interstate 0 0 0 0 0
Period Rural Principal Arterial 42,414 42,156 44,354 47,607 39,788
(9:00 AM - Rural Minor Arterial 68,160 70,479 76,395 87,753 82,679
3:00 PM) Rural Major Collector 125,806 124,420 134,128 143,923 137,282
Rural Minor Collector 75,727 77,004 83,925 97,184 101,275
Rural Local 161,780 167,062 193,033 232,174 237,497
Urban Interstate 482,789 500,843 568,102 624,432 510,206
Urban Other Freeway/Xprway 0 0 0 0 0
Urban HOT/HOV 0 0 0 0 0
Urban Principal Arterial 282,066 287,837 295,533 316,604 294,349
Urban Minor Arterial 287,258 288,602 323,528 356,053 333,395
Urban collector 214,619 215,466 229,017 252,104 285,351
Urban Local 328,160 327,740 353,409 395,075 429,912
PM Peak Rural Interstate 0 0 0 0 0
(3:00PM - Rural Principal Arterial 33,563 33,478 34,234 35,589 32,228
6:00 PM) Rural Minor Arterial 58,307 59,635 61,666 68,925 73,473
Rural Major Collector 103,080 103,294 107,437 108,659 117,377
Rural Minor Collector 69,840 70,084 73,070 79,288 97,567
Rural Local 120,351 124,505 142,497 168,525 175,619
Urban Interstate 372,341 386,810 479,352 531,181 493,661
Urban Other Freeway/Xprway 0 0 0 0 0
Urban HOT/HOV 0 0 0 0 0
Urban Principal Arterial 205,647 210,525 211,939 222,977 204,058
Urban Minor Arterial 203,243 205,522 224,043 245,511 239,511
Urban collector 160,911 164,529 168,384 179,906 203,011
Urban Local 222,875 222,971 239,499 266,665 283,533
Night Rural Interstate 0 0 0 0 0
Period Rural Principal Arterial 25,061 25,364 27,354 29,827 29,876
(6:00 PM - Rural Minor Arterial 39,010 40,755 44,138 49,840 53,295
6:00 AM) Rural Major Collector 66,717 65,232 71,202 76,230 81,209
Rural Minor Collector 37,782 37,702 41,297 47,693 57,552
Rural Local 73,280 76,047 88,025 105,869 125,430
Urban Interstate 296,483 305,261 342,581 375,607 330,357
Urban Other Freeway/Xprway 0 0 0 0 0
Urban HOT/HOV 0 0 0 0 0
Urban Principal Arterial 153,257 157,148 164,745 175,099 184,385
Urban Minor Arterial 143,993 145,701 163,798 179,798 183,937
Urban collector 92,107 92,081 97,799 108,516 137,927
Urban Local 144,598 143,697 155,250 173,277 204,910
Cabarrus County Total VMT 6,079,985 6,181,845 6,793,375 7,483,533 7,485,001

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2008 8-Hour Ozone Marginal Nonattainment Area
Table 4.2.14-2. Daily Vehicle Miles Traveled for Gaston County
Travel Period Road Type 2014 2015 2018 2022 2026
AM Peak Rural Interstate 34,557 34,791 36,407 38,406 33,019
(6:00 AM - Rural Principal Arterial 56,698 56,294 57,057 58,961 73,850
9:00 AM) Rural Minor Arterial 49,584 52,515 54,292 57,248 59,737
Rural Major Collector 57,437 58,479 61,440 65,665 79,091
Rural Minor Collector 35,053 35,729 37,416 40,509 47,959
Rural Local 48,567 49,224 50,953 53,551 48,201
Urban Interstate 436,046 437,339 446,003 461,082 472,748
Urban Other Freeway/Xprway 21,663 21,528 21,866 22,631 25,879
Urban HOT/HOV 0 0 0 0 0
Urban Principal Arterial 265,284 267,431 276,673 289,583 303,913
Urban Minor Arterial 218,618 219,640 226,223 235,902 257,263
Urban collector 54,786 55,788 58,269 61,507 71,657
Urban Local 198,034 199,636 207,542 216,977 213,515
Midday Rural Interstate 45,132 45,643 48,402 51,905 34,562
Period Rural Principal Arterial 73,074 73,989 75,553 80,501 83,444
(9:00 AM - Rural Minor Arterial 64,203 66,699 70,525 74,628 85,401
3:00 PM) Rural Major Collector 78,383 80,365 84,677 90,360 96,815
Rural Minor Collector 44,351 44,393 46,451 49,312 52,126
Rural Local 71,618 72,188 75,099 78,830 72,200
Urban Interstate 602,056 612,551 635,969 670,339 556,290
Urban Other Freeway/Xprway 29,883 30,461 30,913 32,267 36,051
Urban HOT/HOV 0 0 0 0 0
Urban Principal Arterial 387,650 385,689 401,882 421,132 430,664
Urban Minor Arterial 325,365 327,459 337,113 352,394 366,482
Urban collector 80,364 81,105 84,367 88,919 108,238
Urban Local 318,714 319,254 330,231 345,077 387,964
PM Peak Rural Interstate 36,997 37,332 38,873 40,828 31,651
(3:00PM - Rural Principal Arterial 62,197 61,427 62,332 64,750 72,085
6:00 PM) Rural Minor Arterial 53,694 57,115 59,482 63,606 61,974
Rural Major Collector 64,742 66,414 69,995 73,711 85,144
Rural Minor Collector 41,839 42,618 44,802 48,311 53,136
Rural Local 56,042 56,930 59,331 62,762 54,093
Urban Interstate 467,545 470,125 479,219 493,477 482,634
Urban Other Freeway/Xprway 23,373 23,071 23,297 24,224 25,835
Urban HOT/HOV 0 0 0 0 0
Urban Principal Arterial 299,562 300,198 312,069 328,838 332,909
Urban Minor Arterial 247,314 248,666 255,345 267,193 287,891
Urban collector 65,018 66,307 68,361 71,382 79,667
Urban Local 219,679 220,893 228,882 239,541 244,503
Night Rural Interstate 28,188 28,391 29,863 31,909 22,100
Period Rural Principal Arterial 44,897 45,371 45,318 47,524 50,420
(6:00 PM - Rural Minor Arterial 33,835 35,889 37,705 40,048 48,667
6:00 AM) Rural Major Collector 41,860 42,450 44,159 46,176 56,039
Rural Minor Collector 20,275 20,227 20,978 22,000 27,466
Rural Local 34,791 35,046 36,185 37,587 38,081
Urban Interstate 372,145 378,212 388,098 410,332 377,099
Urban Other Freeway/Xprway 19,393 19,561 19,192 20,086 25,338
Urban HOT/HOV 0 0 0 0 0
Urban Principal Arterial 203,671 203,198 209,249 215,140 222,779
Urban Minor Arterial 160,734 160,840 165,877 173,423 193,537
Urban collector 36,548 36,876 38,195 39,890 59,198
Urban Local 143,492 143,962 148,794 154,485 189,486
Gaston County Total VMT 6,374,953 6,429,308 6,640,924 6,954,907 7,118,803

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2008 8-Hour Ozone Marginal Nonattainment Area
Table 4.2.14-3. Daily Vehicle Miles Traveled for Iredell County
Travel Period Road Type 2014 2015 2018 2022 2026
AM Peak Rural Interstate 51,536 52,851 54,784 56,753 63,624
(6:00 AM - Rural Principal Arterial 0 0 0 0 0
9:00 AM) Rural Minor Arterial 21,644 22,172 22,995 23,669 23,192
Rural Major Collector 27,050 27,608 29,066 29,455 32,771
Rural Minor Collector 36,330 36,732 38,477 40,630 49,104
Rural Local 81,741 82,007 86,569 93,063 108,302
Urban Interstate 143,299 147,038 152,069 142,783 160,551
Urban Other Freeway/Xprway 0 0 0 0 0
Urban HOT/HOV 0 0 0 27,544 31,861
Urban Principal Arterial 27,848 27,574 28,992 30,549 31,033
Urban Minor Arterial 31,082 31,719 32,875 33,976 38,786
Urban collector 50,284 50,358 52,481 54,694 60,796
Urban Local 83,436 85,283 91,897 99,540 103,079
Midday Rural Interstate 65,269 66,977 70,689 74,873 74,188
Period Rural Principal Arterial 0 0 0 0 0
(9:00 AM - Rural Minor Arterial 35,445 36,406 37,931 39,372 40,289
3:00 PM) Rural Major Collector 40,059 40,423 42,973 45,688 50,964
Rural Minor Collector 54,701 55,547 58,714 62,408 70,864
Rural Local 124,389 125,068 132,301 143,837 178,695
Urban Interstate 196,973 201,953 213,241 216,070 215,518
Urban Other Freeway/Xprway 0 0 0 0 0
Urban HOT/HOV 0 0 0 15,370 25,269
Urban Principal Arterial 44,789 44,950 47,015 49,640 49,955
Urban Minor Arterial 48,671 50,572 52,322 54,600 60,811
Urban collector 77,202 78,123 81,948 86,449 98,269
Urban Local 139,343 142,373 154,154 167,996 185,285
PM Peak Rural Interstate 55,379 56,498 58,395 60,629 63,238
(3:00PM - Rural Principal Arterial 0 0 0 0 0
6:00 PM) Rural Minor Arterial 24,932 25,517 26,651 27,221 24,372
Rural Major Collector 30,134 30,558 32,132 31,866 34,394
Rural Minor Collector 41,746 42,461 44,368 46,468 53,620
Rural Local 92,450 93,092 98,078 105,012 123,159
Urban Interstate 153,424 155,989 160,687 149,106 159,663
Urban Other Freeway/Xprway 0 0 0 0 0
Urban HOT/HOV 0 0 0 34,702 34,041
Urban Principal Arterial 30,642 30,864 32,080 33,627 33,511
Urban Minor Arterial 34,589 34,698 36,620 37,610 42,640
Urban collector 55,442 56,123 58,688 61,373 67,362
Urban Local 94,471 96,698 104,453 112,915 117,135
Night Rural Interstate 38,675 39,714 41,557 44,428 48,969
Period Rural Principal Arterial 0 0 0 0 0
(6:00 PM - Rural Minor Arterial 23,273 23,768 24,856 25,865 29,654
6:00 AM) Rural Major Collector 20,856 20,528 21,603 23,241 29,155
Rural Minor Collector 24,974 25,591 27,042 29,002 36,090
Rural Local 56,979 57,673 60,542 65,537 91,362
Urban Interstate 113,535 116,493 121,676 129,046 147,987
Urban Other Freeway/Xprway 0 0 0 0 0
Urban HOT/HOV 0 0 0 59 916
Urban Principal Arterial 26,187 26,132 27,303 28,738 31,904
Urban Minor Arterial 28,450 28,639 29,421 29,741 37,105
Urban collector 38,110 38,618 40,888 43,448 54,632
Urban Local 62,174 63,708 68,706 75,126 91,319
Iredell County Total VMT 2,427,512 2,469,099 2,597,237 2,783,719 3,105,435

On-road Mobile Source Inventory Documentation 29
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Table 4.2.14-4. Daily Vehicle Miles Traveled for Lincoln County
Travel Period Road Type 2014 2015 2018 2022 2026
AM Peak Rural Interstate 0 0 0 0 0
(6:00 AM - Rural Principal Arterial 20,747 21,302 22,113 23,204 32,571
9:00 AM) Rural Minor Arterial 106,015 111,442 115,565 121,946 135,248
Rural Major Collector 15,137 15,428 15,873 16,432 18,888
Rural Minor Collector 35,505 37,785 40,045 42,683 37,782
Rural Local 122,885 129,385 138,443 150,164 161,052
Urban Interstate 0 0 0 0 0
Urban Other Freeway/Xprway 51,424 50,774 51,790 54,257 73,990
Urban HOT/HOV 0 0 0 0 0
Urban Principal Arterial 26,628 27,287 27,606 28,891 36,916
Urban Minor Arterial 64,140 64,940 66,664 68,430 75,102
Urban collector 16,735 16,830 17,333 18,066 17,519
Urban Local 37,516 37,130 37,853 38,868 37,841
Midday Rural Interstate 0 0 0 0 0
Period Rural Principal Arterial 30,037 30,756 32,021 33,679 40,885
(9:00 AM - Rural Minor Arterial 154,693 160,725 166,779 175,251 194,974
3:00 PM) Rural Major Collector 21,288 21,601 22,493 23,498 24,700
Rural Minor Collector 45,051 47,468 51,742 55,544 41,465
Rural Local 181,400 189,208 201,397 217,935 248,835
Urban Interstate 0 0 0 0 0
Urban Other Freeway/Xprway 71,264 72,217 74,231 79,712 84,079
Urban HOT/HOV 0 0 0 0 0
Urban Principal Arterial 38,013 39,291 40,129 42,228 53,470
Urban Minor Arterial 97,271 97,808 100,721 103,346 115,179
Urban collector 25,140 24,922 25,575 26,423 23,240
Urban Local 61,596 60,559 61,592 63,368 66,095
PM Peak Rural Interstate 0 0 0 0 0
(3:00PM - Rural Principal Arterial 22,945 23,518 24,490 25,740 27,491
6:00 PM) Rural Minor Arterial 114,529 119,884 124,569 132,228 134,839
Rural Major Collector 16,451 16,899 17,517 18,146 18,451
Rural Minor Collector 40,019 43,456 45,638 48,397 37,070
Rural Local 138,147 145,362 153,872 166,221 169,717
Urban Interstate 0 0 0 0 0
Urban Other Freeway/Xprway 57,012 55,809 57,655 60,810 65,714
Urban HOT/HOV 0 0 0 0 0
Urban Principal Arterial 29,134 30,029 30,765 32,389 37,448
Urban Minor Arterial 68,665 69,333 71,310 73,330 76,649
Urban collector 19,418 19,478 20,046 20,829 17,700
Urban Local 42,441 41,888 42,720 43,879 40,276
Night Rural Interstate 0 0 0 0 0
Period Rural Principal Arterial 19,257 19,735 20,549 21,580 23,451
(6:00 PM - Rural Minor Arterial 94,300 98,688 102,312 106,624 128,736
6:00 AM) Rural Major Collector 12,006 12,192 12,566 12,998 13,445
Rural Minor Collector 20,333 22,103 24,166 26,980 23,631
Rural Local 89,534 92,567 98,993 107,078 131,685
Urban Interstate 0 0 0 0 0
Urban Other Freeway/Xprway 41,522 42,006 42,237 44,915 47,294
Urban HOT/HOV 0 0 0 0 0
Urban Principal Arterial 21,600 22,233 23,043 24,446 30,980
Urban Minor Arterial 58,150 58,442 60,392 61,750 70,068
Urban collector 11,982 11,916 12,175 12,584 11,604
Urban Local 29,402 29,028 29,687 30,498 34,371
Lincoln County Total VMT 2,169,332 2,231,424 2,324,665 2,455,347 2,660,450

On-road Mobile Source Inventory Documentation 30
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Table 4.2.14-5. Daily Vehicle Miles Traveled for Mecklenburg County
Travel Period Road Type 2014 2015 2018 2022 2026
AM Peak Rural Interstate 0 0 0 0 0
(6:00 AM - Rural Principal Arterial 39,142 40,081 41,967 44,610 42,388
9:00 AM) Rural Minor Arterial 18,649 19,429 20,122 21,912 22,342
Rural Major Collector 16,663 16,328 16,369 16,835 18,336
Rural Minor Collector 38,457 37,484 41,891 45,338 53,303
Rural Local 72,753 75,940 84,349 97,493 113,826
Urban Interstate 1,712,350 1,741,446 1,806,898 1,844,014 2,230,102
Urban Other Freeway/Xprway 1,218,723 1,401,052 1,481,278 1,559,147 2,001,948
Urban HOT/HOV 9,771 13,473 25,411 113,677 380,114
Urban Principal Arterial 1,119,879 1,123,704 1,173,209 1,237,075 1,248,275
Urban Minor Arterial 1,029,914 1,042,665 1,105,579 1,161,820 1,186,291
Urban collector 855,507 876,125 919,921 971,245 1,069,633
Urban Local 1,523,084 1,520,243 1,608,305 1,721,836 1,933,136
Midday Rural Interstate 0 0 0 0 0
Period Rural Principal Arterial 53,167 53,274 57,259 60,932 65,415
(9:00 AM - Rural Minor Arterial 25,167 26,240 28,378 31,187 33,314
3:00 PM) Rural Major Collector 23,769 23,862 23,478 25,184 27,290
Rural Minor Collector 54,897 52,791 60,308 67,600 81,321
Rural Local 109,035 112,469 129,258 151,825 182,648
Urban Interstate 2,373,626 2,399,912 2,516,822 2,637,032 2,927,088
Urban Other Freeway/Xprway 1,641,842 1,849,310 1,966,306 2,114,328 2,755,858
Urban HOT/HOV 276 2,415 13,145 57,451 331,182
Urban Principal Arterial 1,741,760 1,763,075 1,840,528 1,948,288 1,977,170
Urban Minor Arterial 1,621,168 1,654,018 1,751,761 1,853,379 1,878,409
Urban collector 1,333,408 1,377,762 1,452,204 1,548,207 1,693,673
Urban Local 2,493,329 2,497,214 2,650,182 2,850,365 3,350,287
PM Peak Rural Interstate 0 0 0 0 0
(3:00PM - Rural Principal Arterial 43,084 44,625 47,114 50,265 45,042
6:00 PM) Rural Minor Arterial 20,893 21,689 22,460 24,145 23,432
Rural Major Collector 19,334 19,728 19,044 18,654 21,441
Rural Minor Collector 45,858 44,655 49,567 53,851 63,126
Rural Local 83,421 86,811 96,558 111,298 134,310
Urban Interstate 1,844,732 1,892,027 1,957,367 1,984,843 2,365,161
Urban Other Freeway/Xprway 1,332,109 1,541,594 1,624,970 1,715,431 2,141,638
Urban HOT/HOV 5,581 9,495 28,522 142,141 461,820
Urban Principal Arterial 1,270,179 1,273,364 1,332,888 1,402,008 1,410,040
Urban Minor Arterial 1,176,178 1,179,788 1,250,922 1,312,842 1,363,616
Urban collector 969,863 990,977 1,041,673 1,098,217 1,215,088
Urban Local 1,725,788 1,724,962 1,824,047 1,952,156 2,297,232
Night Rural Interstate 0 0 0 0 0
Period Rural Principal Arterial 29,912 29,998 31,885 34,015 40,330
(6:00 PM - Rural Minor Arterial 15,130 15,751 16,706 17,883 20,726
6:00 AM) Rural Major Collector 8,895 9,247 10,049 11,003 11,037
Rural Minor Collector 24,520 23,086 25,768 28,784 35,970
Rural Local 46,172 48,042 54,918 64,804 91,165
Urban Interstate 1,358,620 1,388,068 1,440,938 1,530,519 1,929,610
Urban Other Freeway/Xprway 821,025 931,904 979,734 1,048,590 1,652,989
Urban HOT/HOV 0 6 1,001 1,781 33,264
Urban Principal Arterial 903,995 916,814 958,343 1,000,464 1,088,287
Urban Minor Arterial 812,462 821,302 872,001 908,603 929,494
Urban collector 663,371 677,554 718,074 763,964 884,745
Urban Local 1,096,389 1,093,310 1,153,493 1,234,070 1,488,415
Mecklenburg County Total VMT 33,443,846 34,505,105 36,372,971 38,691,112 45,351,329

On-road Mobile Source Inventory Documentation 31
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Table 4.2.14-6. Daily Vehicle Miles Traveled for Rowan County
Travel Period Road Type 2014 2015 2018 2022 2026
AM Peak Rural Interstate 0 0 0 0 0
(6:00 AM - Rural Principal Arterial 23,100 22,675 22,580 23,008 27,510
9:00 AM) Rural Minor Arterial 22,291 22,378 22,761 23,457 27,260
Rural Major Collector 88,676 88,895 92,791 93,090 99,674
Rural Minor Collector 53,513 52,629 57,987 61,480 83,891
Rural Local 88,943 89,078 92,428 95,856 88,616
Urban Interstate 358,483 363,727 392,138 446,964 454,914
Urban Other Freeway/Xprway 0 0 0 0 0
Urban HOT/HOV 0 0 0 0 0
Urban Principal Arterial 100,256 101,019 102,884 99,741 93,436
Urban Minor Arterial 111,703 112,071 114,193 116,587 116,808
Urban collector 106,139 106,578 109,893 112,467 124,038
Urban Local 139,933 141,019 146,626 153,692 154,345
Midday Rural Interstate 0 0 0 0 0
Period Rural Principal Arterial 26,948 26,673 27,386 28,341 29,099
(9:00 AM - Rural Minor Arterial 32,663 32,993 33,812 35,253 38,339
3:00 PM) Rural Major Collector 115,588 116,132 120,521 124,355 117,755
Rural Minor Collector 67,040 67,794 72,862 77,937 80,845
Rural Local 137,045 137,814 142,376 148,927 135,763
Urban Interstate 505,430 514,529 549,931 602,709 493,092
Urban Other Freeway/Xprway 0 0 0 0 0
Urban HOT/HOV 0 0 0 0 0
Urban Principal Arterial 147,044 147,470 151,977 151,669 139,232
Urban Minor Arterial 175,026 175,293 179,715 184,725 176,717
Urban collector 155,604 156,767 161,742 170,250 176,302
Urban Local 225,909 227,007 234,657 248,167 262,005
PM Peak Rural Interstate 0 0 0 0 0
(3:00PM - Rural Principal Arterial 23,812 23,677 23,778 24,198 27,352
6:00 PM) Rural Minor Arterial 24,068 24,236 24,597 25,348 27,155
Rural Major Collector 97,536 98,299 102,509 101,776 104,513
Rural Minor Collector 60,238 60,778 67,253 69,370 90,542
Rural Local 98,924 99,746 103,859 107,134 96,734
Urban Interstate 395,947 400,799 430,537 498,798 418,021
Urban Other Freeway/Xprway 0 0 0 0 0
Urban HOT/HOV 0 0 0 0 0
Urban Principal Arterial 111,993 113,202 115,914 109,729 99,080
Urban Minor Arterial 123,022 123,773 126,204 129,696 123,078
Urban collector 121,416 122,731 128,026 127,636 134,844
Urban Local 155,574 156,876 164,093 171,213 168,757
Night Rural Interstate 0 0 0 0 0
Period Rural Principal Arterial 17,889 17,998 18,284 18,765 20,346
(6:00 PM - Rural Minor Arterial 21,294 21,190 21,566 22,303 25,095
6:00 AM) Rural Major Collector 67,270 67,768 70,527 73,465 76,193
Rural Minor Collector 31,480 31,485 33,123 35,214 43,049
Rural Local 65,546 65,962 67,924 70,880 74,285
Urban Interstate 319,627 324,714 348,768 380,915 312,740
Urban Other Freeway/Xprway 0 0 0 0 0
Urban HOT/HOV 0 0 0 0 0
Urban Principal Arterial 76,175 76,305 78,250 78,158 80,285
Urban Minor Arterial 91,821 92,290 94,576 97,101 96,584
Urban collector 74,746 75,192 77,521 82,502 96,192
Urban Local 102,778 103,621 106,234 112,495 133,951
Rowan County Total VMT 4,762,488 4,803,184 5,032,805 5,335,370 5,168,436

On-road Mobile Source Inventory Documentation 32
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Table 4.2.14-7. Daily Vehicle Miles Traveled for Union County
Travel Period Road Type 2014 2015 2018 2022 2026
AM Peak Rural Interstate 0 0 0 0 0
(6:00 AM - Rural Principal Arterial 38,290 38,679 139,766 148,143 121,781
9:00 AM) Rural Minor Arterial 18,961 19,326 19,935 20,923 25,112
Rural Major Collector 155,974 160,654 152,780 162,080 183,501
Rural Minor Collector 64,746 65,986 70,773 76,110 74,178
Rural Local 221,303 229,487 245,198 266,676 272,674
Urban Interstate 0 0 0 0 0
Urban Other Freeway/Xprway 30,292 30,913 71,946 75,440 128,064
Urban HOT/HOV 0 0 108 146 0
Urban Principal Arterial 135,690 136,533 109,726 115,602 118,883
Urban Minor Arterial 108,002 109,907 111,932 118,098 127,726
Urban collector 138,490 141,502 141,864 149,959 181,860
Urban Local 257,504 262,820 262,640 280,569 306,647
Midday Rural Interstate 0 0 0 0 0
Period Rural Principal Arterial 56,512 58,081 171,518 183,038 132,999
(9:00 AM - Rural Minor Arterial 24,025 25,021 28,703 30,045 24,892
3:00 PM) Rural Major Collector 230,210 234,685 223,069 237,483 242,526
Rural Minor Collector 94,961 97,221 103,096 109,701 104,167
Rural Local 335,317 344,216 373,410 406,264 411,591
Urban Interstate 0 0 0 0 0
Urban Other Freeway/Xprway 44,856 46,389 93,399 99,438 166,422
Urban HOT/HOV 0 0 66 77 0
Urban Principal Arterial 207,596 213,330 170,096 180,427 178,450
Urban Minor Arterial 168,170 171,581 173,196 182,470 196,107
Urban collector 215,973 220,204 220,333 231,856 277,361
Urban Local 415,153 426,404 425,307 452,481 520,489
PM Peak Rural Interstate 0 0 0 0 0
(3:00PM - Rural Principal Arterial 41,428 42,297 151,983 162,490 115,692
6:00 PM) Rural Minor Arterial 23,049 24,002 24,252 24,099 28,708
Rural Major Collector 172,819 177,379 167,850 177,517 195,946
Rural Minor Collector 71,464 73,251 78,926 84,655 79,827
Rural Local 248,217 258,196 270,282 295,671 307,033
Urban Interstate 0 0 0 0 0
Urban Other Freeway/Xprway 33,384 34,283 78,151 82,843 138,857
Urban HOT/HOV 0 0 57 62 0
Urban Principal Arterial 149,007 150,385 123,310 130,315 128,021
Urban Minor Arterial 120,278 121,548 123,674 130,083 141,950
Urban collector 155,137 157,147 158,134 166,948 202,130
Urban Local 289,540 295,051 295,573 313,897 351,635
Night Rural Interstate 0 0 0 0 0
Period Rural Principal Arterial 35,847 36,089 89,237 93,190 81,693
(6:00 PM - Rural Minor Arterial 12,087 12,353 13,470 13,621 14,431
6:00 AM) Rural Major Collector 120,528 126,124 125,457 133,429 145,296
Rural Minor Collector 47,795 49,080 52,182 55,497 57,203
Rural Local 152,161 158,002 179,880 195,251 213,467
Urban Interstate 0 0 0 0 0
Urban Other Freeway/Xprway 23,640 23,960 45,799 48,288 97,414
Urban HOT/HOV 0 0 13 16 0
Urban Principal Arterial 114,838 114,656 91,096 97,317 89,518
Urban Minor Arterial 91,292 92,401 96,738 99,934 115,629
Urban collector 107,641 110,417 108,770 115,651 152,031
Urban Local 187,438 192,581 196,320 209,411 252,397
Union County Total VMT 5,159,614 5,282,143 5,780,015 6,157,210 6,704,309

On-road Mobile Source Inventory Documentation 33
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
4.3 ESTIMATED EMISSIONS FROM ON-ROAD MOBILE SOURCES
Tables 4.3-1 and 4.3-2 summarize the on-road mobile source NOx and VOC emissions modeling
results for the Charlotte area.
Table 4.3-1. On-road Mobile Source NOx Emissions by County
County 2014 2015 2018 2022 2026 2014 2015 2018 2022 2026
kg/day tons/day
Cabarrus* 5,989 5,378 3,636 2,619 2,208 6.60 5.93 4.01 2.89 2.43
Gaston* 7,356 6,588 4,266 2,861 2,224 8.11 7.26 4.70 3.15 2.45
Iredell* 3,045 2,765 1,888 1,324 1,171 3.36 3.05 2.08 1.46 1.29
Lincoln* 2,723 2,495 1,697 1,160 963 3.00 2.75 1.87 1.28 1.06
Mecklenburg 24,488 21,952 13,261 9,006 10,957 26.99 24.20 14.62 9.93 12.08
Rowan* 5,825 5,221 3,452 2,417 1,757 6.42 5.76 3.81 2.66 1.94
Union* 5,146 4,659 3,145 2,142 2,074 5.67 5.14 3.47 2.36 2.29
Area Total 54,572 49,058 31,345 21,529 21,354 60.15 54.09 34.56 23.73 23.54
*Emissions are for the portion of the county in the maintenance area

Table 4.3-2. On-road Mobile Source VOC Emissions by County
County 2014 2015 2018 2022 2026 2014 2015 2018 2022 2026
kg/day tons/day
Cabarrus* 3,765 3,525 2,790 2,390 1,600 4.15 3.89 3.08 2.63 1.76
Gaston* 4,179 3,893 2,858 2,200 1,524 4.61 4.29 3.15 2.42 1.68
Iredell* 1,768 1,655 1,297 1,042 782 1.95 1.82 1.43 1.15 0.86
Lincoln* 1,737 1,642 1,272 1,021 688 1.91 1.81 1.40 1.13 0.76
Mecklenburg 13,060 12,167 9,316 7,702 6,476 14.40 13.41 10.27 8.49 7.14
Rowan* 3,408 3,156 2,380 1,835 1,246 3.76 3.48 2.62 2.02 1.37
Union* 3,210 2,996 2,347 1,928 1,471 3.54 3.30 2.59 2.13 1.62
Area Total 31,127 29,034 22,260 18,118 13,787 34.32 32.00 24.54 19.97 15.19
*Emissions are for the portion of the county in the maintenance area.

On-road Mobile Source Inventory Documentation 34
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
4.4 MOTOR VEHICLE EMISSIONS BUDGETS FOR CONFORMITY
Transportation Conformity
The purpose of transportation conformity is to ensure that federal transportation actions
occurring in the Charlotte area do not interfere with the area maintaining compliance with the
2008 8-hour ozone standard. This means that the level of emissions estimated by the NCDOT or
the MPOs for the Transportation Improvement Program and Metropolitan Transportation Plan
must not exceed the MVEBs as defined in this maintenance plan.
Safety Margin
A safety margin is the difference between the attainment level of emissions from all source
categories (i.e., point, area, nonroad mobile and on-road mobile) and the projected level of
emissions from all source categories. The State may choose to allocate some of the safety
margin to the MVEBs, for transportation conformity purposes, so long as the total level of
emissions from all source categories remains below the attainment level of emissions for 2014.
The DAQ has decided to allocate a portion of the safety margin to the MVEBs to allow for
unanticipated growth in VMT, changes to vehicle mix assumptions and model uncertainty that
will influence the emission estimations. The DAQ has developed and implemented a five-step
approach for determining the amount of safety margin to apply to the MVEBs.
Step 1 Percentage below the standard
When EPA approved redesignation of the Charlotte area from nonattainment to maintenance for
the 2008 8-hour ozone standard, the ozone design value for the area was 0.073 ppm (based on
certified ambient air monitoring data for 2012-2014) or 2.6% below the standard of 0.075 ppm.
In Step 1, 2% of the safety margin was allocated to the MVEB for 2026 for each county. This
allocation remains the same for the revised maintenance plan even though the ozone design value
for the Charlotte area has declined to 0.070 ppm (based on certified ambient air monitoring data
for 2014-2016).
Step 2 Account for unanticipated model input data changes
For the original maintenance plan, all counties received an additional 5% allocation of safety
margin emissions to the 2026 MVEB to account for model input data changes that can impact the
emissions. The potential model input changes include, but are not limited to, changes in vehicle
activity data (VMT, speeds, etc.) and vehicle fleet characteristics (vehicle population, vehicle
mix assumptions, and vehicle age distribution). Additionally, there are occasional updates to the
MOVES model and the Metrolina Regional Model’s travel demand model which may impact
emissions. For this revision, the allocation was increased from 25% to 45% to provide flexibility

On-road Mobile Source Inventory Documentation 35
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
in using the best available model input data and the latest model versions for future
transportation conformity determinations.
Step 3 Provide flexibility and account for rapid growth for counties that are determined to be
medium to small contributors to the on-road mobile NOx emissions inventory
▪ Counties with <8% of total on-road mobile source NOx and VOC emissions received an
additional 5% of their emissions allocated to MVEB in 2026 (Iredell and Lincoln)
▪ Counties with 8% to 25% of total on-road mobile source NOx and VOC emissions received
an additional 3% of their emissions allocated to MVEB in 2026 (Cabarrus, Gaston, Rowan
and Union)
▪ These allocations are the same as the allocations included in the 2026 MVEBs in the
original maintenance plan.
Step 4 Account for input uncertainty in final year of the maintenance plan
For the original maintenance plan, an additional increase of 10% was applied to the 2026
MVEBs to account for potential changes in VMT, vehicle mix and vehicle age distribution. This
additional percentage is added to the current percentages outlined in the steps above. The DAQ
believes this additional 10% is appropriate for the 2026 MVEBs because ozone values will
continue to drop as NOx levels in 2026 are projected to be less than half of the 2014 base year
emissions for the maintenance area. For Gaston, Iredell, Lincoln, Mecklenburg, and Union
Counties, this allocation is the same as the allocation included in the 2026 MVEBs for these
counties in the original maintenance plan.
An additional increase of 5% is applied to the 2026 MVEBs for Cabarrus and Rowan Counties to
account for travel demand growth that has exceeded the levels modeled for the original version
of the maintenance and redesignation plan. This additional percentage is added to the current
percentages outlined in the steps above. Interagency consultation partners recommended and
agreed to the additional allocation based on a review of recent transportation conformity
determination results. The DAQ believes this additional 5% is appropriate for the 2026 MVEBs
due to the high population growth rates expected for these counties, especially for Cabarrus
county, which is predicted to grow by around 49% between 2013 and 2026.
Step 5 Ensure the sum of the safety margins applied to the MVEB does not exceed 50% of the
total safety margin available
The DAQ will implement a cap to the safety margin applied to the MVEBs. The sum of the
safety margins applied to the MVEBs in the entire maintenance area cannot exceed 50% of the
total safety margin available. In this analysis, steps 1-4 accounted for 21.4% of the total NOx
safety margin and 49.7% of the total VOC safety margin.

On-road Mobile Source Inventory Documentation 36
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Table 4.4-1 summarizes the percent increase to the MVEB for purposes of transportation
conformity for each county in the Charlotte area.
Table 4.4-1. Percent Increase to MVEB
County 2026
Cabarrus 65%
Gaston 60%
Iredell 62%
Lincoln 62%
Mecklenburg 57%
Rowan 65%
Union 60%

Motor Vehicle Emissions Budgets
Tables 4.4-2 and 4.4-3 show the counties with their highway mobile NOx and VOC emissions
expressed in tons per day and the corresponding kilograms per day values for 2014 and 2026.
Table 4.4-2. On-road Mobile Source NOx Emissions
County 2014 2026
tons/day kg/day tons/day kg/day
Cabarrus* 6.60 5,989 2.43 2,208
Gaston* 8.11 7,356 2.45 2,224
Iredell* 3.36 3,045 1.29 1,171
Lincoln* 3.00 2,723 1.06 963
Mecklenburg 26.99 24,488 12.08 10,957
Rowan* 6.42 5,825 1.94 1,757
Union* 5.67 5,146 2.29 2,074
Total 60.15 54,572 23.54 21,354
* Emissions for portion of county included in maintenance area.

On-road Mobile Source Inventory Documentation 37
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Table 4.4-3. On-road Mobile Source VOC Emissions
County 2014 2026
tons/day kg/day tons/day kg/day
Cabarrus* 4.15 3,765 1.76 1,600
Gaston* 4.61 4,179 1.68 1,524
Iredell* 1.95 1,768 0.86 782
Lincoln* 1.91 1,737 0.76 688
Mecklenburg 14.40 13,060 7.14 6,476
Rowan* 3.76 3,408 1.37 1,246
Union* 3.54 3,210 1.62 1,471
Total 34.32 31,127 15.19 13,787
* Emissions for portion of county included in maintenance area.
The DAQ established 2014 and 2026 MVEBs for transportation conformity purposes based on
the jurisdictional boundaries of the MPOs and/or RPOs within the Charlotte maintenance area.
Tables 4.4-4 through 4.4-6 list the NOx and VOC MVEBs. Upon EPA’s affirmative adequacy
finding for these MVEBs, these MVEBs will become the applicable MVEBs for each MPO/RPO
county grouping.
Table 4.4-4. Cabarrus-Rowan MPO MVEB*

2014 2026
NOx
(kg/day)
VOC
(kg/day)
NOx
(kg/day)
VOC
(kg/day)
Base Emissions 11,814 7,173 3,965 2,846
Safety Margin Allocated to MVEB - - 2,578 1,907
Conformity MVEB 11,814 7,173 6,543 4,753
*Includes the portions of Cabarrus and Rowan Counties in the maintenance area.
Table 4.4-5. Gaston-Cleveland-Lincoln MPO MVEB*

2014 2026
NOx
(kg/day)
VOC
(kg/day)
NOx
(kg/day)
VOC
(kg/day)
Base Emissions 10,079 5,916 3,187 2,212
Safety Margin Allocated to MVEB - - 1,930 1,371
Conformity MVEB 10,079 5,916 5,117 3,583
* Includes the portions of Gaston and Lincoln Counties in the maintenance area.

On-road Mobile Source Inventory Documentation 38
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area

Table 4.4-6. Charlotte Regional TPO – Rocky River RPO MVEB*

2014 2026
NOx
(kg/day)
VOC
(kg/day)
NOx
(kg/day)
VOC
(kg/day)
Base Emissions 32,679 18,038 14,202 8,729
Safety Margin Allocated to MVEB - - 8,215 5,089
Conformity MVEB 32,679 18,038 22,417 13,818
*Includes all of Mecklenburg County and the portions of Iredell and Union Counties in the
maintenance area.

On-road Mobile Source Inventory Documentation 39
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
5.0 MOVES INPUT DATA
5.1 VEHICLE MIX DATA
Tables 5.1-1 through 5.1-2 show definitions of the vehicle types and facility (roadway) types
referred to in the vehicle mix tables. Tables 5.1-3 through 5.1-6 list the vehicle mix data for each
inventory year modeled.
Table 5.1-1. Vehicle Type Descriptions
ID#
Vehicle
Type Description
1 LDV Light-Duty Vehicles (Passenger Cars)
2 LDT1 Light-Duty Trucks 1 (0-6,000 lbs. GVWR, 0-3,750 lbs. LVW)
3 LDT2 Light-Duty Trucks 2 (0-6,000 lbs. GVWR, 3,751-5,750 lbs. LVW)
4 LDT3 Light-Duty Trucks 3 (6,001-8,500 lbs. GVWR, 0-5,750 lbs. ALVW)
5 LDT4 Light-Duty Trucks 4 (6,001-8,500 lbs. GVWR, 5,751 lbs. and greater ALVW)
6 HDV2 Class 2b Heavy-Duty Vehicles (8,501-10,000 lbs. GVWR)
7 HDV3 Class 3 Heavy-Duty Vehicles (10,001-14,000 lbs. GVWR)
8 HDV4 Class 4 Heavy-Duty Vehicles (14,001-16,000 lbs. GVWR)
9 HDV5 Class 5 Heavy-Duty Vehicles (16,001-19,500 lbs. GVWR)
10 HDV6 Class 6 Heavy-Duty Vehicles (19,501-26,000 lbs. GVWR)
11 HDV7 Class 7 Heavy-Duty Vehicles (26,001-33,000 lbs. GVWR)
12 HDV8A Class 8a Heavy-Duty Vehicles (33,001-60,000 lbs. GVWR)
13 HDV8B Class 8b Heavy-Duty Vehicles (>60,000 lbs. GVWR)
14 HDBS School Buses
15 HDBT Transit and Urban Buses
16 MC Motorcycles

Table 5.1-2. Facility (Roadway) Type Descriptions
Facility Type Description Facility Type Description
11 Rural Interstate 23 Urban Interstate
13 Rural Other Principal Arterial 25 Urban Other Freeways and Expressways
15 Rural Minor Arterial 27 Urban Other Principal Arterial
17 Rural Major Collector 29 Urban Minor Arterial
19 Rural Minor Collector 31 Urban Collector
21 Rural Local 33 Urban Local

On-road Mobile Source Inventory Documentation 40
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Table 5.1-3. 2014 North Carolina Vehicle Mix Data
Fraction of VMT on Facility Type by Vehicle Type (each column should sum to 1)
Vehicle
Type 11 13 15 17 19 21 23 25 27 29 31 33
1 0.3008 0.3205 0.3284 0.3296 0.3358 0.3336 0.3288 0.3295 0.3387 0.3421 0.3437 0.3316
2 0.0917 0.0977 0.1002 0.1005 0.1024 0.1017 0.1003 0.1004 0.1033 0.1043 0.1049 0.1011
3 0.3052 0.3252 0.3334 0.3345 0.3406 0.3383 0.3336 0.3341 0.3436 0.347 0.3489 0.3364
4 0.094 0.1002 0.1027 0.103 0.1049 0.1042 0.1028 0.1029 0.1059 0.1069 0.1075 0.1036
5 0.0432 0.0461 0.0472 0.0474 0.0482 0.0479 0.0473 0.0473 0.0487 0.0492 0.0494 0.0477
6 0.0514 0.0337 0.0265 0.0255 0.0201 0.0221 0.0263 0.0258 0.0174 0.0144 0.0128 0.0238
7 0.005 0.0033 0.0026 0.0025 0.002 0.0021 0.0026 0.0025 0.0017 0.0014 0.0012 0.0023
8 0.0042 0.0028 0.0022 0.0021 0.0016 0.0018 0.0021 0.0021 0.0014 0.0012 0.001 0.0019
9 0.0032 0.0021 0.0016 0.0016 0.0012 0.0014 0.0016 0.0016 0.0011 0.0009 0.0008 0.0015
10 0.0116 0.0076 0.006 0.0057 0.0045 0.005 0.0059 0.0058 0.0039 0.0032 0.0029 0.0054
11 0.0135 0.0089 0.007 0.0067 0.0053 0.0058 0.0069 0.0068 0.0046 0.0038 0.0034 0.0063
12 0.0147 0.0096 0.0076 0.0073 0.0058 0.0063 0.0075 0.0074 0.005 0.0041 0.0037 0.0068
13 0.0526 0.0344 0.0271 0.0261 0.0206 0.0226 0.0269 0.0264 0.0178 0.0147 0.0131 0.0243
14 0.0026 0.0017 0.0014 0.0013 0.001 0.0011 0.0013 0.0013 0.0009 0.0007 0.0007 0.0012
15 0.0013 0.0009 0.0007 0.0007 0.0005 0.0006 0.0007 0.0007 0.0004 0.0004 0.0003 0.0006
16 0.005 0.0053 0.0054 0.0055 0.0055 0.0055 0.0054 0.0054 0.0056 0.0057 0.0057 0.0055
Sum 1 1 1 1 1 1 1 1 1 1 1 1

On-road Mobile Source Inventory Documentation 41
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Table 5.1-4. 2015 North Carolina Vehicle Mix Data
Fraction of VMT on Facility Type by Vehicle Type (each column should sum to 1)
Vehicle
Type 11 13 15 17 19 21 23 25 27 29 31 33
1 0.2939 0.3129 0.3208 0.3218 0.3279 0.3255 0.3213 0.3214 0.3308 0.3342 0.3357 0.3239
2 0.0929 0.099 0.1015 0.1018 0.1036 0.103 0.1015 0.1017 0.1046 0.1056 0.1062 0.1024
3 0.3092 0.3296 0.3378 0.3389 0.3451 0.3428 0.3381 0.3386 0.3482 0.3516 0.3535 0.3409
4 0.0953 0.1015 0.1041 0.1044 0.1063 0.1056 0.1041 0.1043 0.1073 0.1083 0.1089 0.105
5 0.0438 0.0467 0.0479 0.048 0.0489 0.0486 0.0479 0.048 0.0493 0.0498 0.0501 0.0483
6 0.0513 0.0336 0.0264 0.0255 0.0201 0.0221 0.0262 0.0258 0.0174 0.0144 0.0128 0.0237
7 0.0051 0.0034 0.0026 0.0025 0.002 0.0022 0.0026 0.0026 0.0017 0.0014 0.0013 0.0024
8 0.0042 0.0028 0.0022 0.0021 0.0016 0.0018 0.0021 0.0021 0.0014 0.0012 0.001 0.0019
9 0.0031 0.0021 0.0016 0.0016 0.0012 0.0014 0.0016 0.0016 0.0011 0.0009 0.0008 0.0015
10 0.0115 0.0076 0.006 0.0057 0.0045 0.005 0.0059 0.0058 0.0039 0.0032 0.0029 0.0053
11 0.0136 0.0089 0.007 0.0068 0.0053 0.0059 0.007 0.0069 0.0046 0.0038 0.0034 0.0063
12 0.0147 0.0096 0.0076 0.0073 0.0058 0.0063 0.0075 0.0074 0.005 0.0041 0.0037 0.0068
13 0.0525 0.0344 0.027 0.0261 0.0206 0.0226 0.0268 0.0264 0.0178 0.0147 0.013 0.0243
14 0.0026 0.0017 0.0014 0.0013 0.001 0.0011 0.0013 0.0013 0.0009 0.0007 0.0007 0.0012
15 0.0013 0.0009 0.0007 0.0007 0.0005 0.0006 0.0007 0.0007 0.0004 0.0004 0.0003 0.0006
16 0.005 0.0053 0.0054 0.0055 0.0056 0.0055 0.0054 0.0054 0.0056 0.0057 0.0057 0.0055
Sum 1 1 1 1 1 1 1 1 1 1 1 1

On-road Mobile Source Inventory Documentation 42
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Table 5.1-5. 2018 North Carolina Vehicle Mix Data
Fraction of VMT on Facility Type by Vehicle Type (each column should sum to 1)
Vehicle
Type 11 13 15 17 19 21 23 25 27 29 31 33
1 0.2768 0.295 0.3024 0.3036 0.309 0.3068 0.3027 0.3029 0.3116 0.3147 0.3163 0.305
2 0.0958 0.1021 0.1047 0.105 0.1069 0.1062 0.1047 0.1049 0.1079 0.109 0.1095 0.1056
3 0.3189 0.3399 0.3484 0.3495 0.3559 0.3536 0.3487 0.3492 0.3591 0.3627 0.3646 0.3516
4 0.0983 0.1048 0.1074 0.1077 0.1097 0.109 0.1075 0.1076 0.1107 0.1118 0.1124 0.1084
5 0.0452 0.0481 0.0494 0.0495 0.0504 0.0501 0.0494 0.0495 0.0509 0.0514 0.0516 0.0498
6 0.0513 0.0336 0.0264 0.0255 0.0201 0.0221 0.0262 0.0258 0.0174 0.0144 0.0128 0.0238
7 0.0051 0.0033 0.0026 0.0025 0.002 0.0022 0.0026 0.0026 0.0017 0.0014 0.0013 0.0024
8 0.0043 0.0028 0.0022 0.0021 0.0017 0.0019 0.0022 0.0022 0.0015 0.0012 0.0011 0.0020
9 0.0031 0.0021 0.0016 0.0016 0.0012 0.0013 0.0016 0.0016 0.0011 0.0009 0.0008 0.0015
10 0.0115 0.0075 0.0059 0.0057 0.0045 0.0049 0.0059 0.0058 0.0039 0.0032 0.0029 0.0053
11 0.0136 0.0089 0.007 0.0067 0.0053 0.0058 0.0069 0.0068 0.0046 0.0038 0.0034 0.0063
12 0.0148 0.0097 0.0076 0.0073 0.0058 0.0064 0.0075 0.0074 0.005 0.0041 0.0037 0.0068
13 0.0525 0.0344 0.0271 0.0261 0.0206 0.0226 0.0268 0.0264 0.0178 0.0147 0.0131 0.0243
14 0.0026 0.0017 0.0013 0.0013 0.001 0.0011 0.0013 0.0013 0.0009 0.0007 0.0006 0.0012
15 0.0013 0.0009 0.0007 0.0006 0.0005 0.0006 0.0007 0.0007 0.0004 0.0004 0.0003 0.0006
16 0.0049 0.0052 0.0053 0.0053 0.0054 0.0054 0.0053 0.0053 0.0055 0.0056 0.0056 0.0054
Sum 1 1 1 1 1 1 1 1 1 1 1 1

On-road Mobile Source Inventory Documentation 43
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Table 5.1-6. 2020 and beyond North Carolina Vehicle Mix Data
Fraction of VMT on Facility Type by Vehicle Type (each column should sum to 1)
Vehicle
Type 11 13 15 17 19 21 23 25 27 29 31 33
1 0.2651 0.2837 0.2896 0.2895 0.2874 0.2908 0.2905 0.2933 0.3010 0.3018 0.3062 0.2923
2 0.0966 0.1033 0.1055 0.1054 0.1045 0.1059 0.1058 0.1068 0.1096 0.1099 0.1115 0.1065
3 0.3214 0.3438 0.3510 0.3508 0.3478 0.3523 0.3520 0.3554 0.3647 0.3657 0.3709 0.3544
4 0.0991 0.1060 0.1082 0.1081 0.1072 0.1086 0.1085 0.1095 0.1124 0.1127 0.1143 0.1092
5 0.0456 0.0488 0.0498 0.0498 0.0493 0.0500 0.0499 0.0504 0.0517 0.0519 0.0526 0.0503
6 0.0534 0.0335 0.0275 0.0272 0.0277 0.0238 0.0277 0.0243 0.0163 0.0156 0.0119 0.0204
7 0.0053 0.0033 0.0027 0.0027 0.0027 0.0023 0.0027 0.0024 0.0016 0.0015 0.0012 0.0020
8 0.0045 0.0028 0.0023 0.0023 0.0023 0.0020 0.0023 0.0020 0.0014 0.0013 0.0010 0.0017
9 0.0034 0.0021 0.0017 0.0017 0.0017 0.0015 0.0017 0.0015 0.0010 0.0010 0.0007 0.0013
10 0.0120 0.0075 0.0062 0.0061 0.0062 0.0054 0.0062 0.0055 0.0037 0.0035 0.0027 0.0046
11 0.0142 0.0089 0.0073 0.0072 0.0073 0.0063 0.0073 0.0064 0.0043 0.0041 0.0031 0.0054
12 0.0154 0.0096 0.0079 0.0078 0.0080 0.0069 0.0080 0.0070 0.0047 0.0045 0.0034 0.0059
13 0.0546 0.0342 0.0281 0.0278 0.0283 0.0244 0.0283 0.0248 0.0167 0.0159 0.0121 0.0209
14 0.0036 0.0052 0.0044 0.0047 0.0044 0.0074 0.0031 0.0038 0.0038 0.0034 0.0032 0.0104
15 0.0018 0.0026 0.0022 0.0024 0.0022 0.0037 0.0016 0.0019 0.0019 0.0017 0.0016 0.0052
16 0.0040 0.0047 0.0056 0.0065 0.0130 0.0087 0.0044 0.0050 0.0052 0.0055 0.0036 0.0095
Sum 1 1 1 1 1 1 1 1 1 1 1 1

On-road Mobile Source Inventory Documentation 44
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
5.2 METEOROLOGICAL DATA
Table 5.2-1 lists the meteorological data used for all counties. Data were based on July 2014 24-
hour temperature and relative humidity observations from Charlotte Douglas International
Airport. Each record represents the temperature and relative humidity reading for a specific
clock hour, averaged over all days of the month. For example, the first record shows the average
temperature and relative humidity observed between midnight and 1:00AM during July 2014.
Table 5.2-1. Meteorological Data - KCLT Weather Station– July 2014
monthID zoneID hourID temperature relHumidity
7 371190 1 72.3 78
7 371190 2 71.9 78
7 371190 3 70.9 81
7 371190 4 70.4 82
7 371190 5 69.5 84
7 371190 6 69.6 84
7 371190 7 72.1 80
7 371190 8 74.6 74
7 371190 9 76.6 69
7 371190 10 79.5 63
7 371190 11 81.2 57
7 371190 12 82.7 55
7 371190 13 84 52
7 371190 14 84.5 51
7 371190 15 84.8 51
7 371190 16 84.6 51
7 371190 17 83.7 52
7 371190 18 82.1 55
7 371190 19 79.8 61
7 371190 20 77.7 66
7 371190 21 76.2 69
7 371190 22 75.1 72
7 371190 23 73.9 74
7 371190 24 73 75

On-road Mobile Source Inventory Documentation 45
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
5.3 MOVES MODELING DATA FILES
For this revision, changes were only made to the 2026 onroad mobile source emissions
inventories that serve as the basis for this maintenance SIP. The MOVEs modeling data files are
provided to fully document the on-road mobile source emissions inventories in the SIP.

Due to their size, format, and complexity, all MOVES data files were provided in electronic
format. Three types of files are included:
• MOVES run specification (RunSpec) files – flat text files named in the format
<cFIPSyYYYY_Project_I&M_RVP>.mrs
• MOVES input databases – compressed archives of MOVES MySQL input databases with
file names in the format < cFIPSyYYYY_Project_I&M_RVP >_cdb.zip
• MOVES output databases – compressed archives of MOVES MySQL output databases
with file names in the format < cFIPSyYYYY_Project_I&M_RVP >_out.zip,

The file name < cFIPSyYYYY_Project_I&M_RVP > describes the county, year modeled,
modeling project name, I&M parameters, and gasoline RVP used for the MOVES model run as
follows:
• FIPS – the 5-digit state-county Federal Information Processing Standard (FIPS) number
for the county modeled
• YYYY – calendar year modeled
• Project – the name of the MOVES modeling project assigned by DAQ for project
management purposes
• I&M – the I&M compliance rate, waiver rate, and number of latest model years
exempted, or if no I&M program is modeled
• RVP – indicates the gasoline RVP specification used in the modeling
Files for the 2026 model runs were named in a slightly different format,
<Project_cFIPSyYYYY_TDM_I&M>, with RVP omitted and optionally replaced with TDM to
signify VMT inputs from travel demand modeling.

For example, “c37025y2014_CGS2014SIP_9551_90” specifies a model run for Cabarrus
County, NC (FIPS 37025) for 2014 as part of the “CGS2014SIP” MOVES modeling project with
95% I&M compliance rate, 5% waiver rate, and 1 latest model year vehicles exempted from
I&M requirements and 9.0 psi RVP gasoline. A file name that includes
“c37071y2018_CGSSIPRev2017_9653_90” specifies a model run for Gaston County, NC (FIPS
37071) for 2018 as part of the “CGSSIPRev2017” MOVES modeling project with 96% I&M
compliance rate, 5% waiver rate, and the 3 latest model year vehicles exempted from I&M
requirements and 9.0 psi RVP gasoline. Table 5.3-1 lists the files provided.

On-road Mobile Source Inventory Documentation 46
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
Table 5.3-1. MOVES Modeling Files Provided
County Run Spec File MOVES Input and Output Databases
Cabarrus c37025y2014_CGS2014SIP_9551_90.mrs c37025y2014_CGS2014SIP_9551_90_cdb.zip
c37025y2014_CGS2014SIP_9551_90_out.zip
Cabarrus c37025y2015_CGS2014SIP_9653_90.mrs c37025y2015_CGS2014SIP_9653_90_cdb.zip
c37025y2015_CGS2014SIP_9653_90_out.zip
Cabarrus c37025y2018_CGSSIPRev2017_9653_90.mrs c37025y2018_CGSSIPRev2017_9653_90_cdb.zip
c37025y2018_CGSSIPRev2017_9653_90_out.zip
Cabarrus c37025y2022_CGSSIPRev2017_9653_90.mrs c37025y2022_CGSSIPRev2017_9653_90_cdb.zip
c37025y2022_CGSSIPRev2017_9653_90_out.zip
Cabarrus MetrolinaMOVES3MVEB_c37025y2026_TDM_9653_20MY.mrs metrolinamoves3mveb_c37025y2026_9653_20my_cdb.zip
metrolinamoves3mveb_c37025y2026_tdm_9653_20my_out.zip
Gaston c37071y2014_CGS2014SIP_9551_90.mrs c37071y2014_CGS2014SIP_9551_90_cdb.zip
c37071y2014_CGS2014SIP_9551_90_out.zip
Gaston c37071y2015_CGS2014SIP_9653_90.mrs c37071y2015_CGS2014SIP_9653_90_cdb.zip
c37071y2015_CGS2014SIP_9653_90_out.zip
Gaston c37071y2018_CGSSIPRev2017_9653_90.mrs c37071y2018_CGSSIPRev2017_9653_90_cdb.zip
c37071y2018_CGSSIPRev2017_9653_90_out.zip
Gaston c37071y2022_CGSSIPRev2017_9653_90.mrs c37071y2022_CGSSIPRev2017_9653_90_cdb.zip
c37071y2022_CGSSIPRev2017_9653_90_out.zip
Gaston MetrolinaMOVES3MVEB_c37071y2026_TDM_9653_20MY.mrs metrolinamoves3mveb_c37071y2026_9653_20my_cdb.zip
metrolinamoves3mveb_c37071y2026_tdm_9653_20my_out.zip
Iredell c37097y2014_CGS2014SIP_9551_90.mrs c37097y2014_CGS2014SIP_9551_90_cdb.zip
c37097y2014_CGS2014SIP_9551_90_out.zip
Iredell c37097y2015_CGS2014SIP_9653_90.mrs c37097y2015_CGS2014SIP_9653_90_cdb.zip
c37097y2015_CGS2014SIP_9653_90_out.zip
Iredell c37097y2018_CGSSIPRev2017_9653_90.mrs c37097y2018_CGSSIPRev2017_9653_90_cdb.zip
c37097y2018_CGSSIPRev2017_9653_90_out.zip
Iredell c37097y2022_CGSSIPRev2017_9653_90.mrs c37097y2022_CGSSIPRev2017_9653_90_cdb.zip
c37097y2022_CGSSIPRev2017_9653_90_out.zip
Iredell MetrolinaMOVES3MVEB_c37097y2026_TDM_9653_20MY.mrs metrolinamoves3mveb_c37097y2026_9653_20my_cdb.zip
metrolinamoves3mveb_c37097y2026_tdm_9653_20my_out.zip
Lincoln c37109y2014_CGS2014SIP_9551_90.mrs c37109y2014_CGS2014SIP_9551_90_cdb.zip
c37109y2014_CGS2014SIP_9551_90_out.zip
Lincoln c37109y2015_CGS2014SIP_9653_90.mrs c37109y2015_CGS2014SIP_9653_90_cdb.zip
c37109y2015_CGS2014SIP_9653_90_out.zip
Lincoln c37109y2018_CGSSIPRev2017_9653_90.mrs c37109y2018_CGSSIPRev2017_9653_90_cdb.zip
c37109y2018_CGSSIPRev2017_9653_90_out.zip
Lincoln c37109y2022_CGSSIPRev2017_9653_90.mrs c37109y2022_CGSSIPRev2017_9653_90_cdb.zip
c37109y2022_CGSSIPRev2017_9653_90_out.zip
Lincoln MetrolinaMOVES3MVEB_c37109y2026_TDM_9653_20MY.mrs metrolinamoves3mveb_c37109y2026_9653_20my_cdb.zip
metrolinamoves3mveb_c37109y2026_tdm_9653_20my_out.zip

On-road Mobile Source Inventory Documentation 47
Supplement III to the Revised Maintenance Plan for Charlotte-Gastonia-Salisbury, NC December 19, 2022
2008 8-Hour Ozone Marginal Nonattainment Area
County Run Spec File MOVES Input and Output Databases
Mecklenburg c37119y2014_CGS2014SIP_9551_90.mrs c37119y2014_CGS2014SIP_9551_90_cdb.zip
c37119y2014_CGS2014SIP_9551_90_out.zip
Mecklenburg c37119y2015_CGS2014SIP_9653_90.mrs c37119y2015_CGS2014SIP_9653_90_cdb.zip
c37119y2015_CGS2014SIP_9653_90_out.zip
Mecklenburg c37119y2018_CGSSIPRev2017_9653_90.mrs c37119y2018_CGSSIPRev2017_9653_90_cdb.zip
c37119y2018_CGSSIPRev2017_9653_90_out.zip
Mecklenburg c37119y2022_CGSSIPRev2017_9653_90.mrs c37119y2022_CGSSIPRev2017_9653_90_cdb.zip
c37119y2022_CGSSIPRev2017_9653_90_out.zip
Mecklenburg MetrolinaMOVES3MVEB_c37119y2026_TDM_9653_20MY.mrs metrolinamoves3mveb_c37119y2026_9653_20my_cdb.zip
metrolinamoves3mveb_c37119y2026_tdm_9653_20my_out.zip
Rowan c37159y2014_CGS2014SIP_9551_90.mrs c37159y2014_CGS2014SIP_9551_90_cdb.zip
c37159y2014_CGS2014SIP_9551_90_out.zip
Rowan c37159y2015_CGS2014SIP_9653_90.mrs c37159y2015_CGS2014SIP_9653_90_cdb.zip
c37159y2015_CGS2014SIP_9653_90_out.zip
Rowan c37159y2018_CGSSIPRev2017_9653_90.mrs c37159y2018_CGSSIPRev2017_9653_90_cdb.zip
c37159y2018_CGSSIPRev2017_9653_90_out.zip
Rowan c37159y2022_CGSSIPRev2017_9653_90.mrs c37159y2022_CGSSIPRev2017_9653_90_cdb.zip
c37159y2022_CGSSIPRev2017_9653_90_out.zip
Rowan MetrolinaMOVES3MVEB_c37159y2026_TDM_9653_20MY.mrs metrolinamoves3mveb_c37159y2026_9653_20my_cdb.zip
metrolinamoves3mveb_c37159y2026_tdm_9653_20my_out.zip
Union c37179y2014_CGS2014SIP_9551_90.mrs c37179y2014_CGS2014SIP_9551_90_cdb.zip
c37179y2014_CGS2014SIP_9551_90_out.zip
Union c37179y2015_CGS2014SIP_9653_90.mrs c37179y2015_CGS2014SIP_9653_90_cdb.zip
c37179y2015_CGS2014SIP_9653_90_out.zip
Union c37179y2018_CGSSIPRev2017_9653_90.mrs c37179y2018_CGSSIPRev2017_9653_90_cdb.zip
c37179y2018_CGSSIPRev2017_9653_90_out.zip
Union c37179y2022_CGSSIPRev2017_9653_90.mrs c37179y2022_CGSSIPRev2017_9653_90_cdb.zip
c37179y2022_CGSSIPRev2017_9653_90_out.zip
Union MetrolinaMOVES3MVEB_c37179y2026_TDM_9653_20MY.mrs metrolinamoves3mveb_c37179y2026_9653_20my_cdb.zip
metrolinamoves3mveb_c37179y2026_tdm_9653_20my_out.zip