Issaquah City Council Mobility & Infrastructure Committee September 15, 2026

The City of Issaquah's Mobility and Infrastructure Committee convened on September 15, 2026, to discuss the adaptive signal control feasibility study as part of the city's Intelligent Transportation (IT) plan. The committee reviewed phase one findings, including corridor evaluations and performance metrics developed with input from the Transportation Advisory Board (TAB). Consultants and city staff highlighted the challenges and costs associated with implementing adaptive signal control technology (ASCT), emphasizing the need for foundational improvements in signal detection, communication infrastructure, and coordination with Washington State Department of Transportation (WSDOT) signals before pursuing full ASCT deployment. The committee considered public and council feedback, including concerns about prioritizing pedestrian and bicycle experience versus driver experience, and the ongoing difficulties in synchronizing city signals with state-controlled intersections. Ultimately, the administration recommended focusing on incremental IT plan improvements such as maintenance, communication upgrades, and video analytics rather than advancing to phase two of the ASCT study. The committee expressed general agreement with this approach, noting the importance of addressing fundamental infrastructure and staffing needs prior to adopting complex adaptive signal systems.