Turn, Turn, Turn: A History of Turn Signals
Ridiculous History
00:00
Do You Have a Flashway Directional Signal Kit?
In 1940 Buick changed around the directional lights by extending it to the front lights as well. This also had kind of what we know of the modern self-cancelling mechanism. You don't want a competitor's car to seem like it's safer or cooler than yours. So in 1940, these things become standard on Cadillac, Buicks, Hudson's and Chevrolet's.
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