In large cities, some taxi drivers belong to labor unions. The union to which most belong is the International Brotherhood of Teamsters. The Transportation Alliance describes itself as "a nonprofit trade association of and for the private passenger transportation industry."
- Air Traffic Controllers
- Airplane Dispatchers
- Airport Security Personnel
- Airport Service Workers
- App Services Workers
- Armored Truck Drivers
- Autonomous Vehicle Safety and Test Drivers
- Aviation Safety Inspectors
- Avionics Engineers
- Avionics Technicians
- Driverless Car Engineers
- Fleet Maintenance Technicians
- Flight Attendants
- Flight Instructors
- Green Transportation Careers
- Hypersonics Engineers
- Hypersonics Technicians
- Mobility Managers
- Non-Destructive Testing Specialists
- Pilots
- Public Transportation Operators
- Race Car Drivers
- Railroad Conductors
- Reservation and Ticket Agents
- Ship's Captains
- Space Pilots
- Toll Collectors
- Traffic Engineers
- Transportation Engineers
- Transportation Planners
- Truck Dispatchers
- Truck Drivers