noun
fare evasion; unauthorized travel; riding without a valid ticket
Refers to boarding a train, bus, or other public transport without paying the proper fare, or using a ticket improperly. Often used in official announcements and legal contexts.
不正乗車は法律違反です。
Fare evasion is against the law.
駅員が不正乗車の取り
Station staff are cracking down on fare evasion.