高こう速そくパトカー

noun

highway patrol car

A police car specifically designed or used for patrolling expressways and high-speed roads.

• 高こう速そく道どう路ろで高こう速そくパトカーが追おい越こし車しゃ線せんを走はしっていた。

  A highway patrol car was driving in the passing lane on the expressway.