How Do Traffic Signals Work?
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Traffic management in dense urban areas is an extremely complex problem with a host of conflicting goals and challenges. One of the most fundamental of those challenges happens at an intersection, where multiple streams of traffic - including vehicles, bikes and pedestrians - need to safely, and with any luck, efficiently, cross each others’ paths. However we accommodate it now or in future, traffic will continue to be one of the biggest challenges in our urban areas and traffic signals will continue to be one of its solutions.
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Writing/Editing/Production: Grady Hillhouse
Animation: Stephanie White, Connor Claver, Dayan D’Aniello
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Practical Engineering
Grady Hillhouse is a professional civil engineer and hobbyist everything else in San Antonio, Texas. Randall Munroe said, "You can look at practically any part of anything manmade around you and think, Some engineer was frustrated while designing this. I...