Traffic Signals

The Traffic Division manages 114 traffic signals to keep drivers and pedestrians moving safely. Most signals use pavement sensors or cameras to detect when a vehicle is waiting.

Sometimes equipment fails or power fluctuates, causing a light to get "stuck." If you see a light that stays green too long when no cars are there, or a light that won't change, please let us know.

How to Report a Traffic Signal Problem

Identify the time of day to find the right contact method:

  • Monday – Friday (7:30 am to 4:00 pm): Call Public Services at 515-222-3480.
  • Nights and Weekends: Call Westcom Dispatch at 515-222-3321.
  • Anytime: Report the issue online through SeeClickFix.

Flashing Yellow Arrow Left-Turn Signals

The City uses flashing yellow arrows to improve traffic flow while keeping turns safe.

A four-section traffic signal showing (from top to bottom): a steady red arrow, a steady yellow arrow, a flashing yellow arrow, and a steady green arrow. A caption explains that a flashing yellow arrow means you may turn left after yielding to oncoming traffic and pedestrians.