Where would one go about finding data for traffic lights?

For example, scheduled timings as well as actual (historical) timings.

(San Francisco)

  • To be clear, you are not looking for latitude/longitude of the traffic lights (which can be found on OpenStreetMap), but only for when each light was/will be green/yellow/red, right?
    – Nicolas Raoul
    Commented Jan 5, 2023 at 8:12
  • @NicolasRaoul, Yepp, I need it to produce (very) accurate traffic predictions.
    – Pacerier
    Commented Jan 6, 2023 at 21:44

1 Answer 1


Traffic Technology Services provides live traffic light status (red, yellow , green, etc...) data. For San Francisco, it might be available via https://datasf.org/


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