Were Stop Signs Ever Yellow?

Oct 17, 2021

The first STOP sign appeared in 1915 in Detroit, Michigan. There were a variety of colors used for STOP signs until the late 1920s, when the background color was standardized on yellow for maximum day and night visibility. Remember that this was a number of years before the invention of glass-bead retroreflectorization for sign faces, so a red sign looked very dark at night.

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Posted by: Pat Monks