CROSSWALK BUTTON LOCATOR
In 2000, 4 WPI students built a $400-per-intersection system to help blind pedestrians find crosswalk buttons. 26 years later, locator tones are standard features of accessible pedestrian signals across U.S. cities
'F*** I am so alone': Hacked California crosswalk buttons play messages mocking Elon Musk and Mark Zuckerberg
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