Longman Dictionary of Contemporary English
traffic cop
noun
EXAMPLES FROM CORPUS
▪ As the reader might expect, I had my hands full acting like a traffic cop.
▪ Silicon Valley also is playing a major role in policing the Internet jam, like a traffic cop in downtown San Francisco.
WordNet
traffic cop
n. a policeman who controls the flow of automobile traffic
Usage examples of "traffic cop".
A Russian officer took over as traffic cop, waving the Brad forward, then right toward the assembly area.
A traffic cop in San Jose saw a parked gray late-model Jag about a half hour ago.
I could pick out Don Grace, good old Tom Denver, and Jerry Kesserling, the traffic cop.
The bastards must have loved it, Jack thought bleakly, watching a traffic cop settling a dispute at a busy corner.
Or a communications officer getting in a fight with a traffic cop, both of whom had just received commendations several days before.
The mind-mother in Eddie's head spoke up at once, her voice as stern and commanding as the voice of a traffic cop: Don't you dare do it, Eddie!