Artwork

How do stoplights know when to change?

Moment of Um

89 subscribers

published

iconShare
 
Manage episode 486784600 series 3313150
Content provided by American Public Media. All podcast content including episodes, graphics, and podcast descriptions are uploaded and provided directly by American Public Media or their podcast platform partner. If you believe someone is using your copyrighted work without your permission, you can follow the process outlined here https://staging.podcastplayer.com/legal.

Waiting for a stoplight to turn green can be really annoying, especially when you’re running late. It would be awesome if you had a magic wand you could wave to get the light to change. But alas, such things don’t exist. But how do stoplights know when to switch colors? We asked Jerry Kotzenmacher with the Minnesota Department of Transportation to help us find the answer.


Got a nagging question that just won’t yield? Send it to us at BrainsOn.org/contact, and we’ll put you in the express lane to answersville.

  continue reading

551 episodes