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San Anselmo Expands AI Traffic Signals Townwide After Early Gains at ‘The Hub’

A $250,000 county grant will fund a six to 12 month rollout with a consultant set to validate reported wait time cuts.

Overview

  • Roundabout Technologies’ system at The Hub has been running since August with vendor and town estimates of roughly 25–30% peak wait‑time reductions and about 90 combined hours saved daily for drivers.
  • A second site at Bank Street went live this week as officials begin outfitting all 12 local signals and one in Fairfax.
  • The Transportation Authority of Marin grant covers installation and the first two years of service, with per‑intersection installation estimated at $10,000–$15,000 and annual operating costs ranging from about $4,000 to $12,000.
  • San Anselmo contracted an outside consultant to compare historical and current traffic data to independently verify the company’s findings.
  • The AI uses long‑range cameras to map traffic in 3‑D and adjust timing in real time without recording video or reading faces or plates, with pedestrian and cyclist detection and inter‑signal coordination being added.