Asked By: Lilly Schimmel
Date created: Sat, Mar 20, 2021 10:14 AM
Date updated: Fri, Jun 24, 2022 9:51 AM
Top best answers to the question «Who decided traffic lights»
It wasn't until 1920 that a Detroit police officer named William L. Potts devised the three-colored system—red, yellow, and green. A few years later, the lights started changing during timed intervals.