noun, noun or participle which takes 'suru', intransitive verb
Commonly used for police, security, or military patrols. As a suru-verb, it means 'to patrol' or 'to go on patrol'.
警察が夜の街をパトロールしている。
The police are patrolling the streets at night.
警備員が定期的にパトロールを行
Security guards conduct regular patrols.