20200065_R-4707 CP2 (Revisit) Presentation_20160516

Wrenn, Brian L
From:Al-Sharawneh, Ahmad A
Sent:Monday, May 16, 2016 3:54 PM
To:Bailey, David E SAW ([e-mail]); Wrenn, Brian L; Davila, Felix
Cc:Weaver, Derrick G; Al-Sharawneh, Ahmad A
Subject:R-4707 CP2 (Revisit) Presentation
Attachments:R-4707_CP2_Presentation_Final.pdf
Attached the presentation

Ahmad Al-Sharawneh

Project Development Engineer

Project Development and Environmental Analysis

North Carolina Department of Transportation

919 707 6010 office
919 250 4224 fax
[e-mail]

1548 Mail Service Center
Raleigh, NC 27699-1548

Email correspondence to and from this address is subject to the

North Carolina Public Records Law and may be disclosed to third parties.

Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties.
1

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STI P Project R-4707
US 29 � Reedy Fo�k Pa�kway
Inte�change Imp�ovements
Guilfor�d County
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Agenda
Introductions
Purpose of This Meeting
■ Project Overview
■ Project Information
■ Public Involvement
■ Merger Team Concurrences to ��t�
■ CP 2 —Alternatives Considered
■ Build Alternatives
■ Project Schedule
■ Discussion
2
STI P Project R-4707
US 29 & Reedy Fork Par•lcwav Interchange Irn�rovernents
Guilford County
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US -29 looking North from Anita Lane

Pu�pose of This Meeting
STI P Project R-4707
US 29 & Reedy Fork Par•lcwav Interchange Irn�rovernents
Guilford County
The purpose of this meeting is to update the merger team on
the project status and introduce the revised alternative to be
carried forward for detail study.
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P�oject Info�ynation
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US 29 looking south from the Reedy Fork
Parkway bridge
4
STI P Project R-4707
US 29 & Reedy Fork Par•lcwav Interchange Irn�rovernents
Guilford County
• Project is located approximately 8 miles
north of downtown Greensboro in
Guilford County
• The proposed project includes the bridge
replacement and improvements to the
interchange with the realignment, part on
new location, and upgrade of the existing
SR 4771 (Reedy Fork Parkway) and SR
2526 (SummitAvenue).
• Study Area is light industrial, institutional,
and residential
� Existing traffic volumes are 40,000
vehicles per day on US 29
� 2035 traffic is expected to be 72,000
vehicles per day on US 29

P�oject Vicinity Map
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US 29 ! REEQY F�RK PARKWAY
INT�RCHANG�I�PROVEMENTS
VICINkTY MAP
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US 24 AND REE�Y FOF
PARKWAY [SR 4771j
C'rrccnsbora =
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STIP Project R-4707
US 29 c� Reeclv Fork Parlcway h�terrhange lnzp��ovemeizts
Guilfo�d Countv
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STI P Project R-4707
LIS 29 & Reedy Fork Parkway Inte�hange Improvements
Guilford Coui�ty
► Public Involvement
► Citizens Informational Workshop held on
November 13, 2006.
► Public Meeting held on April 21, 2016
• Concerns raised regarding truck
access to local businesses, existing
delays at study area intersections, and
increased truck traffic within the study
area.
� Expressed the need for a traffic light at
the intersection of Eckerson Road and
Reedy Fork Parkway.
• Existing roadway design not
supporting wide turns for large trucks.
• Citizens praised the inclusion of future
bicycle facilities included in project
design.

STI P Project R-4707
Me�ge� Team Concu��ences To Date US 29 � Reedy F°rk P"'�'`��"v Iy1t�"�h"yl�e I'�'�'"°,'e"�ents
Guilford County
CP 1: Purpose and Need & Study Area Defined
(September 21, 2006)
� The Study Area extends approximately 5,000 feet north of the existing
interchange along US 29 and approximately 3,000 feet south along US 29, SR
2641 (Bryan Park Road) and SR 2525 (Summit Avenue). The Study Area also
extends approximately 3,000 feet south east along SR 4771 (Reedy Fork
Parkway)
� The project's purpose is to provide a set of objectives that will address the
transportation needs identified in the study area. The purpose of the proposed
project is to replace the structurally deficient bridge over US 29, improve the
interchange to meet interstate standards and accommodate future traffic volumes
from the Reedy Fork Ranch Mixed Use Development.
7

Me�ge� Team Concu��ences To Date
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�
STI P Project R-4707
US 29 & Reedy Fork Par•lcwav Interchange Irn�rovernents
Guilford County
� CP 2— Design Option,s fo� Detailed Study
Septembe� 21, 2006
No Build Alternative
Build Alternative 1: Single Point Urban Interchange (SPUI)
Build Alternative 2: Partial Cloverleaf Interchange
Build Alternative 3: Traditional Diamond

CP 2— A l te�n a ti ves
Cu��ently Conside�ed
❑ No Build
STI P Project R-4707
US 29 & Reedy Fork Par•lcwav Interchange Irn�rovernents
Guilford County
❑ Build Alternative 1: Single Point Urban Interchange (SPUI)
❑ Build Alternative 1 Revised: Diverging Diamond Interchange (DDI)
❑ Build Alternative 2: Partial Cloverleaf Interchange
❑ Build Alternative 3: Traditional Diamond
All BuildAlternatives include:
► Removal of the existing structurally deficient bridge over US 29;
► Improvements to the existing Summit Avenue;
► Improved traffic flow, safety, and truck movements;
► Improved bicycle and pedestrian facilities on Reedy Fork Parkway.
�

STI P Project R-4707
US 29 & Reedy Fork Par•lcwav Interchange Irn�rovernents
Guilford County
What is a Dive�ging Diamond Inte�change?
The diverging diamond interchange known as a DDI is designed to allow
two directions of traffic to temporarily cross to the opposite side of the
roadway to provide easier access on and off the freeway.
10
• Limits number of traffic
signal phases required to
move motorists through the
interchange
• Movements on and off of
the freeway have fewer
conflict points and can be
free-flowing
• Moves high volumes of
traffic without increasing the
number of lanes in an
interchange

What a�e the Benefits?
• Safety
•
•
•
•
•
•
STI P Project R-4707
US 29 & Reedy Fork Par•lcwav Interchange Irn�rovernents
Guilford County
Fewer conflict points (18 for DDI, 24 for SPUI, 30 for Diamond)
Better sight distance at turns
Wrong way entry to ramps extremely difficult
Less horizontal curvature reduces risks of off-road crashes
Virtually no driver confusion (FHWA study)
Protected pedestrian crossing can be provided at signal
• Pedestrian refuge area is provided in concrete median/islands
• Decreased exposure to free-flowing turning movements �
• Operations
•
•
•
•
•
11 �
Simple left and right turns from all directions
Increases left turn lane capacity without adding lanes
Two phase signals with shorter cycle lengths reduces delay
Better storage between the ramp terminals
Better level of service and ability to handle additional traffic capacity (15%-25%)

•
12
What a�e the Benefits?
COStS
STI P Project R-4707
LIS 29 & Reedy Fork Parkway Inte�hange Improvements
Guilford County
• Construction time is reduced
• Requires minimal detouring during construction
• Usually requires less lanes than other interchange types
• Less bridge structure — construction and long term maintenance
cost savings
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STIP Project R-4707
US 29 c� Reeclv Fork Parlcwav h�terrhange /nzp�-ovemeizts
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CDM Smith recently completed this NCDOT Design Build project R-224�E - DC�1 on 1-4�5
at Mallard Creek. The DDI was chosen over the initially recommended SPUT Alternative.

No�th Ca�olina DDI P�ojects
Asheville
Charlotte
Concord
Cornelius
Greensboro
Kernersville
Leland
Lumberton
Mooresville
Statesville
Winston-Salem
14
STI P Project R-4707
US 29 & Reedy Fork Par•lcwav Interchange Irn�rovernents
Gztiilford County
I-26 at NC 280 (Asheville Airport)
I-485 at Mallard Creek Road
I-85 at Poplar Tent Road
I-85 at NC 73
I-85 at US 29-601
I-77 at Catawba Avenue
I-73 at West Gate City Boulevard
I-40 at Union Cross Road
US 17 at NC 133 (River Road)
I-95 at US-301 (Fayetteville Road)
I-77 at NC 150
I-40atUS21
US 52 at Salem Creek Connector

R-4707 Alte�native 1 (SPUI) vs
Alte�native 1 Revised (DDI)
STI P Project R-4707
US 29 & Reedy Fork Par•lcwav Interchange Irn�rovernents
Guilford County
✓ Width of the bridges over US 29 will be reduced; DDI also allows for a
tangent bridge, unlike the SPUI, which requires extra bridge structure for all
ramps converging to the middle of the bridge
✓ Reduction of lanes on the ramps
✓ Construction time is reduced for the interchange due to a simplified bridge,
thereby reducing labor costs
✓ Ability to handle additional traffic capacity
✓ Improved bicycle and pedestrian safety
✓ Two phase signal reduces delay
15

Build Alte�native 1
� sTiP � R-a�a� ; �
,�''}� US 291 REEDY F�RK PARKWAY
� INTERCHANGE IMPROVEMENT$ +' ,�� €
A,LTERI�ATE 1 i , �
=, 51NGLE POINT URBAN IN7ERCHANGE (SPUI) � '
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FIGURE 2
STIP Project R-4707
US 29 & Reedy Foyk Parl�vay L�tercharzbe Improvenze��ts
Guilford County
• Single Point Urban Interchange
• Three signalized intersections on
Reedy Fork Parkway.
• Summit Avenue will be realigned.
47
0
1,077
, 0.31

Build Alte�native 1 Revised
•
� STPP # R-4707
US 29 I R�EDY FORFt PARKWAY
IN���FCHANGE IMP�20V�IVl�NTS
�,. • ALTERNATE 1 REVISED
; �NERGII'+!G DIAMONd IM1ITERCHAl�ICsE ([DDI} � i
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AlternaQive 1
Re�ised
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FfGURE 3
STIP Project R-4707
US 29 & Reecfy Fov�k Pat�I�n�crv Intercl�ar�i�e Improverrzeizts
Guilforc/ CoT�ntv
;$erging Diamond Interchange
� �ignalization of three intersections
�n Reedy Fork Parkway
��DI has a smaller bridge compared
��o the SPUI
��ridge fits within the fiootprint
49
0
1, 303
0.58

Build Alte�native 2
18
STIP Project R-4707
US 29 & Reecfv Fov�k Pat�I�n�crv Intercl�ar�i�e Improverrzeizts
Gi�ilf'orcl Coity7tv
• Partial Cloverleaf
• Loop and ramp in southeast and southwest
quadrants
• Ramp terminals connect with planned
roadways
Required R/VII (— a
Stream (�
Wetlands (— ac
Residential
Business
0
0
1,122
0.74

Build Alte�native 3
19
STIP Project R-4707
US 29 & Reecfy Fov�k Pat�I�n�crv Intercl�ar�i�e Improverrzeizts
Guilford Couy7tv
�waditional Diamond
� �ne-way diagonal ramp in each
interchange quadrant
• I wo future loops at two quadrants
� �amps are aligned with free-flow
fierminals on US-29
• Signalized intersections on Reedy
Fork Parkway at the ramp
55
0
0
1,140
0.62

Build Alte�native SuYnYna�y
Evaluation Factor
Additional Right of Way
Needed- acres
Residential Relocations
Business Relocations
Stream - linear feet
Wetlands - acres
Ponds
Stream Crossings (#)
Total Riparian Buffer (ft2)
STIP Project R-4707
US 29 & Reedy Fork Par•lcwav Interchange Irn�rovernents
Guilford County
R-4707 ALTERNATIVES COMPARISON
Alternative 1- Alternative 1 Alternative 2-
SPUI Revised - DDI Partial Clover
47
0
0
1, 077
0.31
0
5
136,255
,•
0
0
1,303
0.58
0
5
160,828
Note: Impacts are calculated based on Functional Design and Slope Stakes plus 40'
20
53
0
0
1,122
0.74
0
5
173, 742
Alternative 3 -
Diamond
���
0
0
1,140
0.62
0
6
168,686

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21
STIP Project R-4707
US 29 & Reedy Foyk Parl�vay L�tercharzbe Improvenze��ts
Guilford County
• Interim Design
• Existing bridge is Structurally
Deficient and has a high priority of
replacement per the 2014 Bridge
inspection report.
• The Interim Design is located
within the footprint of the build
alternatives.
• Existing ramps will be used for
access to and from US 29.
• The phased construction is
programmed to start in 2019.

Disadvantages of the SPUI STIP Project R-4707
US 29 & Reedy Foyk Parl�vay L�tercharzbe Improvenze��ts
Guilford County
wi th th e In te�i rn Des ign
• More complicated phased construction decreases safety by increasing
construction time and traffic interruption.
• An interim SPUI bridge eliminates alternatives for other interchange types.
• The interim SPUI bridge does not accommodate the interim phase design.
• The existing ramps cannot be used with the interim SPUI bridge requiring
temporary ramp relocations.
• Less safe due to additional traffic phasing and increased time of
construction
22

P�oject Schedule
Environmental Assessment
Public Hearing
FONSI
Interim Design Right of Way
Acquisition
Interim Design Construction
Begin Right of WayAcquisition
Begin Construction
STI P Project R-4707
US 29 & Reedy Fork Par•lcwav Interchange Irn�rovernents
Guilford County
December 2016
Spring 2017
Summer 2017
FY 2018 '
FY 2019
FY 2022
FY 2024
Notes: These major milestone target dates are preliminary and subject to
change.
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