How do stoplights know when to change?
Leave a reviewWaiting 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.
© American Public Media | 00:05:24
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Full episode description
Episode One: Why do some trees grow taller than others?
This is an Episodic show. You can listen to it in any order, but episode one is always a great place to start.
Full Episode description
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.
© American Public Mediabop| Status: Active, 59 episodes | Kind: Episodic | Episode URL
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