A curb-cut is the area of a curb that is cut out and formed into a ramp; providing wheelchair users access to the sidewalk. Though the first wheelchair was created in 1595; curb-cuts have become commonplace because of disability activists in Berkeley, CA back in the 1970s who "installed" the first ramps on their own in the middle of the night.
Learn more about the history of Curb-Cuts at the Smithsonian.
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