(canty street to pembroke avenue) proposed two...
TRANSCRIPT
TYLER STREET AND POLK STREET (CANTY STREET TO PEMBROKE AVENUE)
PROPOSED TWO-WAY CONVERSION PROJECT
Prepared by
City of Dallas Public Works DepartmentCity of Dallas Planning & Urban Design DepartmentCity of Dallas Department of Street Services
Hayden Consultants, Inc.
April 21, 2016
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Presentation Overview Project Scope
Project Goals
Project Overview
Roundabout at northern Tyler/Polk junction
Southern Tyler/Polk junction reconfiguration
Two-way conversion study of Tyler Street and Polk Streetbetween Canty Street and Pembroke Avenue
Thoroughfare Plan Amendment Process
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Project Scope Convert the existing Tyler/Polk couplet into dual two-way
traffic streets
Replace existing traffic signals with new state-of-the-art trafficsignals to improve efficiency and traffic flow
Striping/signage improvements
Provide roundabout on the north end of the existing couplet
Provide new traffic signal on the south end of the existingcouplet
Estimated cost: $3.1 million3
Project Goals Improved quality of life:
Traffic calming
Provide healthier/more walkable neighborhood
Promote economic development:
Improved access and circulation
Create gateways into the neighborhood:
Provide landscaped roundabout at north end of existing couplet
Provide landscaping at south end of existing couplet
Improved emergency response times4
Project Overview Project location
Existing traffic conditions
Proposed two-way conversion traffic conditions
Tyler-Polk proposed roadway cross-sections
Proposed markings/striping layout
Tyler/Polk northern junction – roundabout
Tyler/Polk southern junction – new traffic signal
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Project Location
Tyler Street
Polk Street
12
thS
treet
Jeffe
rson B
lvd
Davis
Stre
et
10th
Stre
et
6
Existing Traffic Conditions
Tyler Street
Polk Street
12
thS
treet
Jeffe
rson B
lvd
Davis
Stre
et
10th
Stre
et
Tyler Street One-way Northbound Polk Street One-way Southbound7
Proposed Two-Way Conversion
Tyler Street
Polk Street
12
thS
treet
Jeffe
rson B
lvd
Davis
Stre
et
10th
Stre
et
New Traffic Signal at
Southern Tyler/Polk
Junction
New Roundabout at
Northern Tyler/Polk
Junction
Modify/Replace existing
traffic signals
Tyler Street Two-way traffic Polk Street Two-way traffic 8
Tyler and Polk Proposed Cross-Sections
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Proposed Two-Way Conversion Markings/Striping Layout
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Proposed Two-Way Conversion Markings/Striping Layout Continued
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Tyler/Polk Northern Junction - Roundabout
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BENEFITS
Roundabouts are becoming more common in the United States and the state of Texas due to their many benefits.
How to get around Safer Efficient
Observe all standard road rules, including
yielding for pedestrians in crosswalks
Roundabouts reduce delay by allowing motorists to yield
rather than stop at a red light. They can also handle higher
traffic volumes, which helps vehicles get through quicker.
To safely and efficiently drive a roundabout:
Roundabouts are safer than other intersections
because severe head-on and left-turn crashes do
not occur. Other safety benefits include slower
speeds and the one-way circulating traffic.
Slow down
Read advance signing and choose
correct lane
Yield to traffic in all lanes on your left
before entering
Stay in your lane to your exit
EconomicalAccident reduction at
roundabouts Reducing driver delay saves time and fuel. Eliminating signals also
saves approximately $3,000 to $5,000 per year in maintenance
and energy costs.
52% Green
9 %
Roundabouts are proven to
reduce overall accident rates in
Wisconsin by approximately
9%, and reduce severe crashes
by 52%. The 2011 Study by the
UW Traffic Operations & Safety
Laboratory reported zero fatal
crashes. Roundabouts reduce fuel consumption and vehicle pollution
A L L because vehicles are not idling at a red light. INJURY
and bicyclists at roundabouts as compared to signalized
intersections.
The center island of a roundabout provides an opportunity to
beautify the location with landscaping. Flowers, trees, or even
simple green space can be placed in the center of a
roundabout, making the intersection aesthetically pleasing.
Roundabout Myths vs. Facts Yield ►
Myth: Roundabouts are not The “Golden Rule” pedestrian and bicyclist friendly.
of driving roundabouts. Fact: Traffic circles have high-speedentries, variable yield rules, lowcapacity, and many high-speedcrashes. They are dangerous andconfusing to drive.
When you enter the roundabout, you
Fact: There are statistically fewerpedestrian and bicycle crashes atroundabouts than at signalizedintersections. Drivers are required toyield to pedestrians in thecrosswalks, while refuge islandsprovide a space for pedestrians inthe middle of each crossing sopedestrians only cross one directionof traffic at a time.
must yield to circulating traffic .
Roundabouts require motorists to yieldon entry, speeds are low, capacity ishigh, and crashes are few and minor.They are designed to be easy to useand provide a higher level of driversafety.
Yield means the other drivers in thecircle have the right of way. Amotorist approaching a roundaboutshould wait for a safe gap in trafficbefore entering.
In addition, studies show fewer
accidents involving pedestrians
roundabouts are the same thing.
Myth: Traffic circles/rotaries and
Tyler/Polk Southern Junction - Signal
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Two-Way Traffic Study
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Tyler-Polk Two-Way Traffic StudyTraffic Volumes
Existing AM Peak
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Tyler-Polk Two-Way Traffic StudyTraffic Volumes
Existing PM Peak
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Conversion Study Results
60/40 traffic split between Tyler/Polk respectively
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40%
Polk Street
Tyler Street
60%
Tyler-Polk Two-Way Traffic Study
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60%
40%
Polk
Kings
Davis
Tenth
Jefferson
Twelfth
Tyler
Signalized
intersections
PM Southbound
Split
60% 40%
AM Northbound
Split
Roundabout
Motor Vehicle Level of Service at
Signalized Intersections Level of Service (LOS) is a qualitative measure describing operational conditions
within a traffic stream, based on service measures such as speed and travel time,
freedom to maneuver, traffic interruptions, comfort, and convenience.
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(LOS) Average Control Delay per Vehicle
(seconds per vehicle)
General Description
A Less than or equal to 10 seconds Free Flow
B 10-20 seconds Stable flow (slight delays)
C 20-35 seconds Stable flow (acceptable delays)
D 35-55 seconds Approaching unstable flow (tolerable delay, occasionally
wait through more than one signal cycle before proceeding)
E 55-80 seconds Unstable flow (intolerable delay)
F Greater than 80 seconds Forced flow (jammed)
AM Peak Hour Level of Service (LOS)
for Tyler-Polk Two-Way Conversion
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North Section
AM Peak Hour Level of Service (LOS)
for Tyler-Polk Two-Way Conversion
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South Section
PM Peak Hour Level of Service (LOS)
for Tyler-Polk Two-Way Conversion
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North Section
PM Peak Hour Level of Service (LOS)
for Tyler-Polk Two-Way Conversion
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South Section
Tyler-Polk Two-Way Traffic Study
Two-way conversion of Tyler/Polk is feasible from a traffic
operation standpoint
Traffic delays will increase but remain within acceptable level
of service
Parking on Tyler Street will be allowed during peak traffic
hours while still maintaining an acceptable level of service
Conclusions
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Thoroughfare Plan (TP) Amendment Process
~ Three month process
Interdepartmental staff review to gather information from various Citydepartments and other agencies
Community meeting with the property owners to discuss amendment andaddress concerns when necessary
Item considered and voted on by three bodies: 1) City Plan CommissionTransportation Committee (CPCTC); 2) City Plan Commission (CPC); and3) City Council has final authority to approve or deny
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TP Amendment Process (Continued)
City Plan Commission will hold a public hearing to solicit citizeninput before the CPC forwards a recommendation to City Council
City Council will hold a public hearing and take into considerationthe recommendations of the CPC and make the final determinationwhether the thoroughfare plan is amended
If City Council approves the amendment to the Thoroughfare Plan,the map and text will be changed to reflect the amendment
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TP Amendment Proposed Timeline
1st Public Meeting – April 7, 2015
2nd Public Meeting – April 21, 2016
CPC Transportation Committee – May 5, 2016
City Plan Commission – May 19, 2016
City Council – June 22, 2016
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Tyler/Polk Project Schedule
Thoroughfare Amendment Plan Process: April 21 - June 22, 2016
Tyler/Polk Engineering Design: Summer 2016 - Winter 2016
Tyler/Polk Construction: Spring 2017 - Spring 2018
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Questions or Comments?
Staff and consulting teams will be available at the
various subject matter stations to address questions
Staff Contacts:
Tanya Brooks, Assistant Director
Planning and Urban Design
City of Dallas
214-670-4038
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Tim Starr, P.E., Assistant Director
Public Works Department
City of Dallas
214-948-4250