Law mandating curb cuts, in brief (3)

I believe the answer is:

ada

(Other definitions for ada that I've seen before include "-- Lovelace, pioneer in computing" , "Woman" , "Computer language; girl's name" , "Girl's name, one letter short of a man's name" , "- Lovelace, Byron's daughter & computer pioneer" .)

I've seen this clue in The New York Times.

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