The Senseless Ambiguity of North American Turn Signals

Technology Connections looks at why North American cars signal turns in a way that can be ambiguous, including red turn signals that share the brake light. The video compares US practice with the amber signals used elsewhere.

HN keeps linking it as the definitive critique of US turn-signal design, whenever a bad car signal or control comes up.

“The US allows not only red turn signals, but implementing turn signals by flashing brake lights.”