highway patrol

(law enforcement) any police unit which is responsible for overseeing and enforcing of regulations on roads and highways

Japanese Meaning

高速道路や主要道路の規制を監視し、違反を取り締まる警察部隊

The highway patrol pulled over the speeding delivery truck near the rest area and issued a citation.

高速道路警察は休憩所付近で速度超過の配送トラックを止め、違反切符を切った。

Sense（1）

(law enforcement) any police unit which is responsible for overseeing and enforcing of regulations on roads and highways

highway patrols

（ plural ）