A passenger—the person riding on a train, plane, bus, etc.
バスは満席で、乗客は立っている人もいた。
The bus was full; some passengers were standing.
乗客は全員シートベルトを着用してください。
All passengers, please fasten your seatbelts.
列車事故で数名の乗客がけがをした。
A few passengers were injured in the train accident.