Why isn’t there enough green time to get the traffic through the signal for a specific movement?
The amount of green time programmed for each movement at a signal varies by time of day. Sometimes there is more traffic at a signal than the signal can handle, and the signal is over its capacity. In these situations, the Traffic Department attempts to time the signals to equalize delays for conflicting movements. At other times green time can be moved from one movement to a conflicting movement, realizing that improving one movement hurts another. Increasing green for one movement requires decreasing the amount of green time for another movement.

Requests for timing changes at individual intersections should be referred to the Traffic Engineering Division. Here too, information needed for a signal technician to investigate a requested change is what day of the week and at what time of day a problem occurs. Call the Traffic Engineering Division at 707-543-3814.

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1. How are speed limits established and how can I reduce or increase the speed limit on a particular street?
2. Can the City install "Children at Play" or "SLOW" signs on my street?
3. Can the City install a deer crossing sign at a particular location?
4. Can I get red curb painted in front of the fire hydrant by my house?
5. Can the City paint red curb so I can see getting out of a driveway, street or parking lot?
6. How can I get a stop sign installed on a neighborhood street to slow speeders down?
7. What is a commercial vehicle prohibition?
8. How can I get a radar speed feedback sign on my street?
9. How long can a car stay parked on the street?
10. How does a signal operate? Is a specific signal operating correctly?
11. How does a signal operate? Is a specific signal operating correctly?
12. Why do I have to stop? Why are signals so poorly synchronized?
13. Why do I have to wait so long after I stop at a specific signal?
14. Why isn’t there enough green time to get the traffic through the signal for a specific movement?
15. How do I get a new signal installed?
16. How do I find how much traffic there is at a specific location, or how many accidents there have been?
17. How do I find how a signal was operating at a specific time and date, and if it was operating correctly?
18. How does a pedestrian signal work?