Why do some traffic signals take so long to change?
The length of your wait depends on the traffic signal cycle length. The traffic signal cycle length is determined based on traffic volumes and traffic patterns specific to each site. Heavily congested major corridors may require longer cycles to accommodate higher volumes of traffic. Though these longer cycle lengths may move more vehicles through an intersection in a given time frame, they may increase delays for some drivers. Typically, wait times are no longer than three minutes to get a green.

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1. What if there is a problem with a traffic signal?
2. How does the city decide where to install traffic signals?
3. Will a traffic signal reduce crashes at an intersection?
4. What should drivers do when the traffic signal is all dark?
5. Why do some traffic signals take so long to change?
6. Why are traffic signals synchronized on some streets and not on others?
7. Why don’t we allow more left turns on a green ball indication?
8. Why don’t we put in more left turn arrows at signalized intersections?
9. Why isn't there enough green time at a traffic signal to get the traffic through all approaches?
10. Why aren't traffic signals put in flashing operation late at night?
11. What do the symbols at a pedestrian countdown signal mean?