trafficcop
nounUK /ˈtræfɪk kɒp/
US /ˈtræfɪk kɑːp/
A traffic cop is a police officer who makes sure cars and people follow the road rules.
The traffic cop waved us to stop at the busy crossing.
OTHER MEANINGS
2. A person who directs or controls the flow of something, like people or data.
The server acted as a traffic cop, sending each request to the right place.
3. A strict person who enforces rules in a group or game.
Our coach is a real traffic cop about players missing practice.
4. A device or sign that controls movement at a crossing.
The flashing light worked like a traffic cop at the school gate.