What are the basics of traffic signal timing?

Traffic signal timings are determined based primarily on traffic volumes to determine the signal phasing and overall cycle lengths. A signal phase is the time allotted to allow a designated movement to occur and a cycle is one complete rotation though all the phases.

The Town has installed adaptive traffic signal technology into the major corridors (US 17 and Coleman Blvd) which allows the signal phases and cycles to adapt and optimize to varying traffic conditions in real time.

Show All Answers

1. How can I report a pothole?
2. Who do I contact to discuss a signal timing problem I have observed?
3. How do I report a traffic signal that is dark, flashing, or has damaged equipment?
4. How do I request a traffic signal be installed at an intersection?
5. How does the Town of Mount Pleasant decide to install a traffic signal?
6. What is the purpose of a traffic signal?
7. What are the basics of traffic signal timing?
8. Does a traffic signal control speed?
9. Why speeding on US 17 doesn’t pay – An explanation of the Town’s adaptive traffic control system.
10. Does the Town collect video footage from cameras located at traffic signals?
11. Will a traffic signal reduce intersection crashes?
12. Why do some signals have a separate protected green arrow phase for left turns?
13. How does the Town consider requests for a separate protected green arrow phase for left turns?
14. When is a right turn lane or left turn lane justified?
15. What does a flashing yellow arrow mean?
16. What does a flashing yellow ball mean?
17. What does a flashing red ball mean?
18. Why does the signal sometimes skip a phase?
19. How do I get my private road accepted for public maintenance?
20. When will my street be repaved?
21. How do I report broken/fallen street signs?
22. How can my neighborhood request traffic calming devices such as speed humps?
23. How can I determine if my street is owned/maintained by the Town?
24. Do I need a permit from the Town to replace/repair my driveway?
25. Who do I call to request a street light?
26. Where can I find information on Transportation Impact Fees?
27. Are the traffic signals synchronized?