At night, when the semaphore arms weren’t visible, red and green gaslights signaled stop and go. Although ... signal’s arms and lights, the Times found the first traffic light “extremely ...

Using AI and Google Maps, the system measures everything that might affect a city’s driving flow, including traffic light wait times, vehicle speeds, stop-and-go patterns, etc. The research data ...

I believe the rule is that you treat a dead traffic light like a stop sign. I was surprised to ... you could decide to turn around and go home (or whatever route avoided traffic signals).