Do any traffic signals not run in coordination with other traffic signals?

Very few of the traffic signals in Jefferson County are constantly run in “free” mode, meaning they are not coordinated with other signals. When a signal runs in free mode, it does not have to maintain timings that keep it in coordination with adjacent signals, therefore it can quickly change in order to give the green light to a vehicle that has approached and stopped at a red light. Free operation is efficient at locations that have very low volumes, are not near any other traffic signals, or have other unique conditions. Although most of the traffic signals in the county run coordinated during the day, they switch to free operations during the overnight hours when traffic volumes are very low.

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1. What do I do when I see a dark or flashing traffic signal?
2. What happens to Jefferson County traffic signals when they lose power?
3. Who regulates traffic in Jefferson County?
4. Who builds and maintains traffic signals in Jefferson County?
5. How do traffic signals work?
6. Who maintains flashing school zone beacons?
7. How does the county decide when a traffic signal should be installed? Will a traffic signal reduce accidents at an intersection?
8. What is the purpose of cameras at signalized intersections?
9. Are traffic signals in Jefferson County coordinated to reduce or eliminate the need to stop at red lights?
10. Once a driver turns onto a street where the traffic signals are coordinated, is it correct that the driver should not have to stop?
11. Do any traffic signals not run in coordination with other traffic signals?
12. Why is there a “Walk” symbol when no pedestrians are present?
13. How do signals for pedestrians work?
14. Why do I have to wait so long to get a green light or a “Walk” signal?
15. Do emergency vehicles get priority at signalized intersections in Jefferson County?
16. Is it possible for two conflicting directions of traffic at a signalized intersection to receive green lights at the same time?
17. How does a flashing yellow left-turn arrow work?