What is the purpose of cameras at signalized intersections?

Jefferson County uses two types of cameras at signalized intersections: detection cameras and traffic monitoring cameras.

Detection Cameras - These cameras use video technology to detect when a vehicle approaches a signalized intersection and are typically mounted on each leg of an intersection. They can be susceptible to false calls when heavy shadows, glare, or snow occur. Please report malfunctioning traffic signals to Transportation and Engineering.

Traffic Monitoring Cameras - These cameras are used by traffic staff to monitor traffic patterns or to check on traffic signal operations. These cameras can be watched live by staff during peak travel periods or when an accident occurs. The county does not store footage from the cameras.

Show All Answers

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?