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Welcome to the Traffic Systems Services Unit General Information
TSSU is primarily thought of for chamber testing, new traffic signal turn on, traffic signal inspections, signal support and intelligent traffic systems support (ITS).     
TSSU also provides expertise in:
Traffic signal testing, turn-on, inspection, and maintenance.
  • Sest minimum standards for traffic signal equipment on State Highway System.
  • Performs maintenance of Road and Weather Information Systems (RWIS), and variable message signs (VMS).
  • Maintains an updated inventory of all traffic signal control and ITS equipment.
  • Keeps records of inspections for existing devices.
  • Performs environmental testing of all traffic signal equipment used within State of Oregon.
  • Repairs and tests all state maintained control equipment modules.


Our Citizens' Representative Office is here to help.
  • Need assistance, information or problem solving regarding a signal? Contact them here.  
  • Contact TSSU at:
    Bike Lane Picture 
    Oregon Department of Transportation
    Traffic Systems Services Unit
    2445 Liberty ST. NE
    Salem, Oregon,97303
    Phone: 503-378-2645
    Hours: 7:00 am to 3:30 pm, Monday through Friday