Join Holly and Tracy as they bring you the greatest and strangest Stuff You Missed In History Class in this podcast by iHeartRadio.
https://www.iheart.com/podcast/stuff-you-missed-in-history-cl-21124503/
The Rise of the Traffic Light
There are multiple contenders when it comes to the question of who invented the traffic light. This episode looks at a few of the moments in traffic light history that got us to where we are today, as well as what made them a necessity in the first place.
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