Wiktionary
flag stops
n. (plural of flag stop English)
Usage examples of "flag stops".
You sit there and wait, then you wave for the bus to stop, like the old flag stops for trains.
Other points of entry for our convenience are automated flag stops.
But he already had the bit, the marshal and three or four spectators cutting across the ring to try to stop him in the back stretch, though they might as well have been hollering at Sam's cannonball limited between two flag stops.