Road sign (3-3)

I believe the answer is:

one-way

(Other definitions for one-way that I've seen before include "Not allowing return motion" , "Unidirectional" , "Type of travel ticket" , "Allowing movement in a single direction" , "Unidrectional" .)

I've seen this clue in the Penny Press.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.