point duty

noun

the stationing of a policeman or traffic warden at a road junction to control and direct traffic
the position at the head of a military patrol, regarded as being the most dangerous

Do you mean she's on speaking terms with the policeman on point duty at Piccadilly Circus?

It was an easy matter to find the constable who had been on point duty at the crossing when the “accident” happened.

Why, even the policeman who stood at point duty outside must have known all about it!

My first impulse was to turn and step along to Oxford Circus, where I knew another constable would be on point-duty.

He's on point duty up and down there for the last ten minutes.

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