Norm Shepard wrote to me asking who invented the third brake light on automobiles. Norm according to the American Psychological Association's online website: "In 1974, psychologist John Voevodsky tested a small, inexpensive gadget that would eventually make U.S. highways much safer. The gadget was a third brake light, mounted in the base of rear windshields so that when drivers pressed their brakes, a triangle of light warned following drivers to slow down. To test whether such a small addition would make a significant difference, Voevodsky equipped 343 San Francisco taxicabs with the third brake light and left 160 taxis with no additional light as a control group. Taxi dispatchers then randomly assigned taxi drivers to taxis with or without the third light, regardless of drivers' expressed preferences. At the end of a 10-month experiment, taxis with a third brake light had suffered 60.6% fewer rear-end collisions than had the control-group taxis."
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Then why do 48 Chrysler products have them??
1974 was not the first time the experiment was done. along with the first comment of proof it was earlier, my father put a third tail light on the back deck of his first car a chevy back in the 50′s while no other car had it, so it was thought of before the 70′s.
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