ATSAC Citywide Adaptive Traffic Signals
This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.
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LADOT's in-house traffic-signal system, first deployed for the 1984 Olympics with 118 signals, now connects roughly 4,850 signals through 26,000+ sensors and around 620 cameras. Los Angeles finished synchronising every signal citywide in February 2013 — one of the first major US cities to do so. A newer adaptive module (ATCS) and AI upgrades retime signals ahead of the 2028 Olympics.
what does this mean?
The strongest source is the operator's or the city's own reporting — an official report, dataset or press release. It grades who did the looking — not how well the project went. All four grades →Sources
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📎 Cite this project
1001 Smart Cities (2026). “ATSAC Citywide Adaptive Traffic Signals” — Los Angeles, United States. The Smart City Atlas. https://1001smartcities.org/projects/la-atsac/ (last verified 2026-07-17). Data: CC BY 4.0.
The underlying data is free to reuse with attribution — see the open data page.