When were the first traffic lights created in the United States?
The first traffic lights in the United States were installed because of an increase in travelers on the road in the 1920s. Worried about accidents, towns and cities installed traffic towers to help the flow of cars. Officers manned the towers, using whistles and red, green and yellow lights to indicate to drivers when they should stop and go.
What’s the history behind the colors?
It’s important to know that before there were traffic lights for cars, there were traffic signals for trains. At first, railroad companies used red to mean stop, white to mean go and green to mean caution.
This Is Why Traffic Lights Are Red, Yellow and Green
This Is Why Traffic Lights Are Red, Yellow and Green
