It’s a good question. Of all the colors they could’ve made school buses, why yellow? That yellow shade even has it’s own name in the color directory “national school bus glossy yellow”.
It started back in 1939 when transportation officials from all 48 states at the time agreed on a number of different safety measures for buses. One of them being the color yellow. Reason being is that yellow is very easy to see in the early morning hours, dusk, or late at night. Also, the black lettering against the yellow makes it easy to read from a distance.
It took a while for all school buses to get on board with the new standard. It wasn’t until 1974 that all school busses were finally yellow.
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