The City currently has 45 traffic signals. The Washington State Department of Transportation (WSDOT) also owns, operates and maintains 10 additional traffic signals within the Issaquah's city limits.
Through the use of an Intelligent Transportation System, City of Issaquah engineers can remotely monitor, operate and manage the City's traffic signals in coordination with WSDOT. View our traffic cams online.
Criteria for New Signals
Standard guidelines for when traffic signals are installed are published by the Federal Highway Administration in the Manual on Uniform Traffic Control Devices.
How Signals Work
Vehicle detectors are typically installed in the pavement near an intersection, which allow the signal controller to know when a vehicle is waiting at an intersection. Signal timing and coordination is performed through an Intelligent Transportation System.
Report a Signal Problem
Most signals located within Issaquah limits are the responsibility of the City. Report malfunctions online or by calling 425-837-3200 and selecting option #3.
However, all signals on State Route 900 or at the "ON" and "OFF" ramps to Interstate 90 are the responsibility of WSDOT. Report WSDOT signal issues here.