Who builds and maintains traffic signals in Jefferson County?

Contractors build traffic signals in Jefferson County as part of capital improvement and safety projects, or larger private developments.  All traffic signals on the Jefferson County roadway system are owned and operated by the county once constructed.  Please refer to the Signalized Intersection List (PDF), for all traffic signals owned and maintained by the county.

Traffic signals located along state highways, (e.g. SH-93, SH-58 and at on-and-off ramps to C-470), are maintained by the Colorado Department of Transportation (CDOT).

Traffic signals located within incorporated cities or towns (e.g. Arvada, Lakewood, Golden, etc.) are maintained and timed by the respective local jurisdiction.

The Transportation and Engineering Division maintains traffic signals on unincorporated county roads. Much of the maintenance work performed on traffic signals is done by the county’s contractor.

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?