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How do Traffic Signals Work (2019)
A high‑level overview of how traffic signals are designed and operated: basic phases, timing rules, actuated detection, coordination between adjacent lights, and emerging adaptive‑control systems that use centralized data and ML. The piece stays at the level of civil‑engineering concepts and does not dive into implementation details relevant to software engineers.
Hacker News front pagepractical.engineering9 minHN5636