It’s Fun to Know: The Fake Speed Bump

City officials in Philadelphia (and a few other cities) have been testing a novel way to slow down traffic: “speed bumps” painted on the road. Thanks to an optical illusion, they look real and drivers do slow down… at least for a few months (until they wise up). Still, it is hoped that they will continue to serve as reminders to slow down and supplement the speed limit signs.

(Source: Associated Press)

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