TYLER STREET AND POLK STREET (CANTY STREET TO PEMBROKE AVENUE) PROPOSED TWO-WAY CONVERSION PROJECT Prepared by City of Dallas Public Works Department City of Dallas Planning & Urban Design Department City of Dallas Department of Street Services Hayden Consultants, Inc. April 21, 2016 1
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 Street between Canty Street and Pembroke Avenue Thoroughfare Plan Amendment Process 2
Project Scope Convert the existing Tyler/Polk couplet into dual two-way traffic streets Replace existing traffic signals with new state-of-the-art traffic signals 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 existing couplet Estimated cost: $3.1 million 3
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 times 4
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 5
Project Location Polk Street Tyler Street 12 th Street Jefferson Blvd Davis Street 10th Street 6
Existing Traffic Conditions Polk Street Tyler Street 12 th Street Jefferson Blvd Davis Street 10th Street Tyler Street One-way Northbound Polk Street One-way Southbound 7
Proposed Two-Way Conversion Modify/Replace existing New Traffic Signal at traffic signals Southern Tyler/Polk Junction Polk Street Tyler Street Jefferson Blvd 12 th Street Davis Street 10th Street New Roundabout at Northern Tyler/Polk Junction Tyler Street Two-way traffic Polk Street Two-way traffic 8
Tyler and Polk Proposed Cross-Sections 9
Proposed Two-Way Conversion Markings/Striping Layout 10
Proposed Two-Way Conversion Markings/Striping Layout Continued 11
Tyler/Polk Northern Junction - Roundabout 12
BENEFITS Roundabouts are becoming more common in the United States and the state of Texas due to their many benefits. Safer Efficient How to get around Roundabouts are safer than other intersections Roundabouts reduce delay by allowing motorists to yield because severe head-on and left-turn crashes do Observe all standard road rules, including rather than stop at a red light. They can also handle higher not occur. Other safety benefits include slower yielding for pedestrians in crosswalks traffic volumes, which helps vehicles get through quicker. speeds and the one-way circulating traffic. To safely and efficiently drive a roundabout: Economical Accident reduction at Roundabouts are proven to Slow down roundabouts reduce overall accident rates in Reducing driver delay saves time and fuel. Eliminating signals also Read advance signing and choose Wisconsin by approximately saves approximately $3,000 to $5,000 per year in maintenance correct lane 9%, and reduce severe crashes and energy costs. Yield to traffic in all lanes on your left by 52%. The 2011 Study by the before entering Green UW Traffic Operations & Safety 52% Stay in your lane to your exit Laboratory reported zero fatal crashes. Roundabouts reduce fuel consumption and vehicle pollution 9 % because vehicles are not idling at a red light. ALL INJURY In addition, studies show fewer The center island of a roundabout provides an opportunity to accidents involving pedestrians beautify the location with landscaping. Flowers, trees, or even and bicyclists at roundabouts as compared to signalized simple green space can be placed in the center of a intersections. roundabout, making the intersection aesthetically pleasing. Roundabout Myths vs. Facts Yield ► The “Golden Rule” Myth: Traffic circles/rotaries and Myth: Roundabouts are not pedestrian and bicyclist friendly. roundabouts are the same thing. of driving roundabouts. Fact: Traffic circles have high-speed Fact: There are statistically fewer pedestrian and bicycle crashes at entries, variable yield rules, low When you enter the roundabout, you capacity, and many high-speed roundabouts than at signalized must yield to circulating traffic . crashes. They are dangerous and intersections. Drivers are required to confusing to drive. yield to pedestrians in the Yield means the other drivers in the crosswalks, while refuge islands circle have the right of way. A Roundabouts require motorists to yield provide a space for pedestrians in motorist approaching a roundabout on entry, speeds are low, capacity is the middle of each crossing so should wait for a safe gap in traffic high, and crashes are few and minor. pedestrians only cross one direction before entering. 13 They are designed to be easy to use of traffic at a time. and provide a higher level of driver safety.
Tyler/Polk Southern Junction - Signal 14
Two-Way Traffic Study 15
Tyler-Polk Two-Way Traffic Study Traffic Volumes Existing AM Peak 16
Tyler-Polk Two-Way Traffic Study Traffic Volumes Existing PM Peak 17
Conversion Study Results 60/40 traffic split between Tyler/Polk respectively 40% Polk Street Tyler Street 60% 18
Tyler-Polk Two-Way Traffic Study PM Southbound 40% Split 60% Kings Signalized intersections Davis Roundabout Polk Tyler Tenth Jefferson Twelfth AM Northbound 60% 40% Split 19
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. (LOS) Average Control Delay per Vehicle General Description (seconds per vehicle) 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) 20
AM Peak Hour Level of Service (LOS) for Tyler-Polk Two-Way Conversion North Section 21
AM Peak Hour Level of Service (LOS) for Tyler-Polk Two-Way Conversion South Section 22
PM Peak Hour Level of Service (LOS) for Tyler-Polk Two-Way Conversion North Section 23
PM Peak Hour Level of Service (LOS) for Tyler-Polk Two-Way Conversion South Section 24
Tyler-Polk Two-Way Traffic Study Conclusions 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 25
Thoroughfare Plan (TP) Amendment Process ~ Three month process Interdepartmental staff review to gather information from various City departments and other agencies Community meeting with the property owners to discuss amendment and address concerns when necessary Item considered and voted on by three bodies: 1) City Plan Commission Transportation Committee (CPCTC); 2) City Plan Commission (CPC); and 3) City Council has final authority to approve or deny 26
TP Amendment Process (Continued) City Plan Commission will hold a public hearing to solicit citizen input before the CPC forwards a recommendation to City Council City Council will hold a public hearing and take into consideration the recommendations of the CPC and make the final determination whether 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 27
TP Amendment Proposed Timeline 1 st Public Meeting – April 7, 2015 2 nd Public Meeting – April 21, 2016 CPC Transportation Committee – May 5, 2016 City Plan Commission – May 19, 2016 City Council – June 22, 2016 28
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 29
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 Tim Starr, P.E., Assistant Director Planning and Urban Design Public Works Department City of Dallas City of Dallas 214-670-4038 214-948-4250 Tanya.Brooks@dallascityhall.com Timothy.Starr@dallascityhall.com 30
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