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Traffic signals

Traffic signal timing and coordination

Traffic signals at a Calgary intersection
Traffic signals at a Calgary intersection
 

Downtown: Our traffic management team programs downtown traffic signals to help keep traffic moving during rush hour, off-peak hours, evenings and weekends.

Outside downtown: Traffic signals are set to provide sequential green lights along major routes. Sensors detect traffic stopped at the opposing intersection, the timing and duration of signals is then adjusted to accommodate traffic volumes in all directions.

If you have a question about the timing of traffic signals, please complete the online service request.

Traffic Signal Timing Inquiry

Report a damaged traffic signal

To report a traffic signal that’s damaged or isn’t working, please complete the online service request.

Report a traffic signal needing repair 

Request a new traffic or left turn signal

We use a warrant system to decide where new traffic signals are needed for safe, efficient traffic flows. Requests for new signals are generally granted for locations that meet the warrant criteria, although installation may be delayed if funding isn’t readily available.

Traffic Signal Warrant Study

We consider several factors during a warrant study. Each finding is scored and the total score determines the action.
  • 100 or higher: A traffic signal is warranted.
  • 80-99: A traffic signal isn’t warranted at this time. However, we’ll put the intersection on a watch list and repeat the study each year.
  • ≤0-79: A traffic signal isn’t warranted at this time. We won’t repeat the study for at least two years unless conditions change.

Search the intersection(s) of interest to see if a Traffic Signal Warrant Study has been conducted. Enter the main road or city quadrant (NW, NE, SW, SE) to find the intersection.

See the Traffic signal warrant list - Jan. 2017

Request a new Traffic Signal Warrant Study

Left Turn Signal Warrant Study

Factors considered in a left-turn warrant study include traffic volumes, delays, collision history and impact on intersection operation. The result is one of two possible outcomes:

  • Warranted: We’ll install a left turn signal, pending funding availability.
  • Not warranted: A left turn signal isn’t warranted at this time. We won’t repeat the study for at least two years unless conditions change.

Search the intersection(s) of interest to see if a Left Turn Signal Warrant Study has been conducted. Enter the main road or city quadrant (NW, NE, SW, SE) to find the intersection.

See the Left turn signal warrant list - Jan. 2017

Request a new Left Turn Arrow warrant study