20 Things Turning 100 in 2020

© AP

The first tri-color, four-way traffic light was created in 1920.

William Potts, a Detroit police officer, created the first three-color, four-directional traffic signal. Prior to Potts’ invention, the traffic light used only red and green lights.

The yellow light was new at the time and became the standard in all traffic signals by the mid-1930s, according to the The Henry Ford Museum.

<1 ... 56 7 89 ... 21>

Related Articles More from author


  1. Barney cooley says

    Judge Judy, too. Congrats @100??

  2. Berni cotton says

    They say Judge Judy, has spent 100 years on the air. Also, it has been said she is turning 100years old. Both can’t be true. Only one is true !

  3. Robert Hutchison says

    This is personal but Liberty County in Montana was established in 1920!

  4. debbie williams says

    i have learned so many things . i really enjoy life in photos. i am amazed at a lot of the photos.

Leave A Reply

Your email address will not be published.