- Bus transportation (11)
- Bus line operations (10)
- Commuter bus operation (5)
- Street and trolley car transportation (1)
- Airport transportation (38)
- Airport limousine, scheduled service (6)
- Airport transportation services, regular route (12)
- Passenger rail transportation (5)
- Subway operation (2)
- Elevated railway operation (1)
- Monorails, regular route: except amusement and scenic (1)
