How are the yellow and all-red clearance times calculated for a traffic signal?
Yellow time is calculated using a nationwide standardized equation based on the speed of traffic on the roadway. The majority of Frisco’s major roadways have speed limits around 40 mph; consequently, a yellow time of about 4 seconds is used at most traffic signals.

The all-red time is also calculated using a nationwide standardized equation for a given speed. The City of Frisco uses all-red values that range between 1 and 3 seconds, depending on the intersection width and speed.

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1. Who do I contact to report a problem with a traffic signal?
2. Why do some intersections have flashing yellow arrows? What do they mean?
3. Why do I have to wait so long for a green light on a side street?
4. Can you change the traffic signals to operate in flashing mode during the late night hours?
5. How are the yellow and all-red clearance times calculated for a traffic signal?
6. Is it necessary for me to push a button to activate the pedestrian signal?
7. Why does the orange hand flash before I’ve completed crossing the street?
8. How do you decide where and when to install traffic signals?
9. How do I request a new traffic signal?
10. Does the City of Frisco record any of the video from its traffic cameras?