- Bus transportation (15)
- Bus line operations (5)
- Commuter bus operation (2)
- Street and trolley car transportation (1)
- Trolley operation (1)
- Airport transportation (22)
- Airport limousine, scheduled service (3)
- Airport transportation services, regular route (2)
- Passenger rail transportation (1)
- Subway operation (1)
- Monorails, regular route: except amusement and scenic (1)
