Curb and kerb refer to the same fundamental concept, but their usage varies based on regional differences. In American English, curb is the preferred term for the stone or concrete edging that lines the street, separating it from the sidewalk. In British English, however, kerb is the preferred spelling for this very same edge.
TIL the spelling is kerb
– Grammarly
I’m British and have always spelled it curb. How embarrassing.
Another tyre/tire conundrum