The Man Who Made the Street Wait Its Turn

Every time a yellow light gives you a second to slow down instead of slamming your brakes, you are living inside Garrett Morgan's idea.

Morgan was born in Kentucky in 1877, left school after the sixth grade, and moved north to Cleveland, where he fixed sewing machines. That job taught him how machines think. He never stopped taking things apart after that.

In 1914 he patented a safety hood, a device that let a person breathe cleaner air near the ground while smoke rose above. In 1916, a tunnel being dug under Lake Erie exploded, trapping workers in gas and darkness. Morgan and his brother put on the hoods and went in themselves. They carried men out.

That detail is worth sitting with. He did not send the invention. He wore it, and walked into the thing it was built for.

Morgan also drove one of the first cars in Cleveland, and he watched an accident at an intersection that stuck with him. Traffic signals then had only two commands: stop and go. Nothing warned you that the change was coming.

So he patented a three-position signal, stop, go, and an all-hold position in between that cleared the intersection before traffic switched. In 1923, General Electric bought the patent for 40,000 dollars. That in-between moment became the yellow light the whole world drives on.

“He watched the intersection fail, and decided it just hadn't been finished yet.”

That is the inventor's habit of mind: nothing around you is finished. It is all waiting for somebody to look closer. Morgan had a sixth-grade education and a repair job, which is to say he had the two things that actually produce inventions, a close look at how something breaks and the nerve to say it could be built better.

It is the same habit that put Mark Dean's name on three of the nine patents behind the first IBM PC, and the same one that had Kunle Olukotun arguing a chip should have many brains while the whole industry told him he was wrong.