TIL elevators in America (ADA compliant) they need to make an audible ding when going up. And double ding ding when going down. Many elevators also make a noise when at the ground floor. For many blind people this is a lifeline which enables them to use elevators.

TIL elevators in America (ADA compliant) they need to make an audible ding when going up. And double ding ding when going down. Many elevators also make a noise when at the ground floor. For many blind people this is a lifeline which enables them to use elevators.

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