How do you decide where and when to install traffic signals?
The installation of traffic signals follows a nationally standardized process that is outlined in the Texas Manual of Uniform Traffic Control Devices (TMUTCD). There is a set of criteria that must be satisfied before a traffic signal can be installed, most of which are based on traffic volumes. Not every street can be given a traffic signal, so traffic volumes are a large factor in determining which intersections will be signalized.

In addition, traffic signals must be spaced a certain distance apart in order to function well. The intersection of 2 major roadways is always assumed to be a future traffic signal location and then other potential locations must be spaced an appropriate distance away. As other traffic signals are added at minor intersections, it further limits the possible location of additional traffic signals.

Finally, the time frame for the installation of a traffic signal is primarily determined by the funding available to us each year. All of the intersections that meet the necessary criteria are prioritized each year based upon the amount of traffic they serve, an analysis of the conflicting movements, and other factors. The city then assigns the available funding to the top ranked locations.

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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?