How do I find how a signal was operating at a specific time and date, and if it was operating correctly?
The Traffic Engineering Division cannot say exactly how a signal was operating on a specific date and time due to field variables such as traffic demand. However, we can determine how a signal was programmed to operate, and if there were any malfunctions such as burned out light bulbs or power outages on a specific date.

Records of all programming changes and all maintenance responses are maintained at the Traffic Engineering Division. Requests for historical records concerning traffic operations should be referred to the Traffic Engineering Division. Requests must be made in writing on a Request for Documents form. All requests will be answered in 10 days. The Traffic Engineering Division does not interpret any timing sheets. To obtain a Request for Documents form, 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?