English version

traffic cop in Police topic

From Longman Dictionary of Contemporary Englishtraffic copˈtraffic cop noun [countable] informal  1 SCPa police officer who stands in the road and directs traffic2 a police officer who stops people who are driving in an illegal way
Examples from the Corpus
traffic copAs 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.