Adaptive Signal Control Technology Project

Contact Information

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

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.

The City of Renton was awarded a grant 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 traffic volumes between 4,000-5,000 vehicles per hour during the peak periods and the peak direction approach has 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 to 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.

Budget

$660,000 is programmed for this project.


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