If you want to get from A to B more safely, be a little more choosy at the cab rank.
If you’ve taken to the United States streets anytime lately, you may have noticed that most public school buses are a very particular shade of yellow. That shade is called National School Bus Glossy Yellow in Canada and the US, and it was specially designed by Dr. Frank Cyr. He was in charge of developing standards for the school bus. While there was no standard prior to this, many wanted something eye-catching so that every driver knew what vehicles hosted dozens of children on their way to learn. So, in 1939, after a long-awaited conference, they chose yellow.