Red and green traffic lights have been around since the 1800s, when British traffic officers used to rotate gas lamps that burned red and green to control the movement of mostly horse-drawn vehicles.

Pull up to an intersection at a red light, eyes ahead, scanning left and right. Maybe the blue light from the traffic signal caught your eyes, like it did for Bob Thompson of Mill Creek. “What is the ...

Many red lights fail to detect smaller vehicles like bikes and scooters due to sensor limitations. Inductive loops, common in traffic signals, rely on sufficient metal mass to register a vehicle.

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