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SW 43rd Street/Carr Road/SE 176th Street/SE Petrovitsky Road Corridor Safety – Adaptive Signal Control Technology (ASCT) Project

Project Limits:

SE Petrovitsky Road/ Carr Road/SW 43rd Street – Oakesdale Avenue SW to 128th Avenue SE;

East Valley Highway – SW 41st Street to SW 43rd Street;

Benson Drive S/108th Avenue SE (SR515) – Benson Road S to SE 180th Street.

Web page last updated: November 15, 2017

Project Manager – Flora Lee, 425-430-7303

Project Schedule – The adaptive signal control system field implementation was begun in October 2017 and is anticipated to complete before the end of 2017.    

Schedule Updates: expect changes in traffic patterns and/or delays between October 27 and November 22 for the SE Petrovitsky Road/ Carr Road/SW 43rd Street and East Valley Highway corridors.  

The system is anticipated to turn on in the next coming weeks to accommodate changing traffic patterns and ease traffic congestion during various peak periods and heavy demands.  When this project is completed, this should improve arterial progression while reducing side street and left turn delay for the work commute traffic and the holidays traffic until the roadway’s vehicle capacity is exceeded or until the very peak of the traffic is experienced.

Project Description – The City of Renton was awarded from the Highway Safety Improvement Program (HSIP) to improve the safety along these major arterials for both motorized and non-motorized users. This project updated thirteen signals, including detection, and the pedestrian and vehicle clearance intervals, to improve safety and traffic flow. This project implements adaptive signal control technology (ASCT) on these arterials and each signal includes a controller that is equipped with the new ASCT.  The signals will be coded to respond automatically to fluctuations in traffic flow through the use of video and in-road vehicle detection during various peak periods throughout the day once this project is completed.

The intersections along these arterials have up to approximately 4,000-5,000 vehicles per hour during the peak periods and the peak direction approach has up to approximately 1,000 vehicles per lane traveling along the arterials.  Each corridor has its unique characteristics, such as high demands of emergency vehicles, heavy side street movements, including on/off ramps to SR167, large commercial vehicles, and pedestrians. In addition, Valley Medical Center expansion project with trucks hauling onto and out from the hospital has an impact the traffic flow along the SW 43rd Street/Carr Road corridor.

Rather than the existing conventional signal system that uses pre-programmed and daily signal timing schedules to balance the queues from all approaches, as well as pedestrian crossing, and prevent gridlocking at the intersections and backing up to the SR-167 northbound ramps, this adaptive system should respond automatically to changing traffic patterns to improve progression throughout the days until the very peak of the traffic when exceeding the roadway capacity.

Project Budget - $660,000 is programmed for this project.


The City of Renton hereby gives public notice that it is the Agency's policy to assure full compliance with Title VI of the Civil Rights Act of 1964, the Civil Rights Restoration Act of 1987, and related statutes and regulations in all programs and activities. Title VI requires that no person shall, on the grounds of race, color, sex, or national origin be excluded from the participation in, be denied the benefits of, or be otherwise subjected to discrimination under any Federal Aid Highway program or other activity for which the City of Renton receives federal financial assistance.

Any person who believes they have been aggrieved by an unlawful discriminatory practice under Title VI has a right to file a formal complaint with the City of Renton. Any such complaint must be in writing and filed with the City of Renton Title VI Coordinator within one hundred, eighty (180) days following the date of the alleged discriminatory occurrence. Title VI Discrimination Complaint Forms may be obtained from the City of Renton, Transportation Division at no cost to the complainant by calling (425) 430-7380.