noun
police mobile traffic unit
A specialized police unit that handles traffic enforcement, escorts, and rapid response to traffic incidents, often using motorcycles or patrol cars.
交通機動隊が高速道路で速度違反の取り締まりを行った。
The police mobile traffic unit conducted speed enforcement on the expressway.
Compound of 交通 (traffic), 機動 (mobile, maneuver), and 隊 (unit, squad).