transport pass; boarding pass; travel pass
A pass or certificate that allows the holder to board or use a specific transport service, such as a bus, train, or taxi. Often issued by companies or organizations for employees or members.
Employees board the bus by showing their commuter transport pass.
With this travel pass, you can ride the train for free within the designated section.
乗車券 is a general ticket for a single ride, whereas 乗車証 implies a pass or certificate, often for repeated or authorized use.
Compound of 乗車 (boarding a vehicle) and 証 (certificate, proof).