Subject
Officials and employees
46
Selection and appointment
46
Appropriations and expenditures
37
Federal aid to transportation
15
Rules and practice
10
Hazardous substances Transportation Law and legislation
9
Accident investigation
7
Evaluation
7
Transportation and state
6
Management
5
Railroads Passenger traffic Security measures
5
Transportation Law and legislation
5
Aeronautics, Commercial Security measures
4
Airline passenger security screening
4
Natural gas pipelines Law and legislation
4
Railroad law
4
Railroads Security measures
4
Trucking Safety measures
4
Aeronautics, Commercial Security measures Finance
3
High speed ground transportation Law and legislation
3
Transportation Security measures
3
Aeronautics, Commercial Security measures Evaluation
2
Airline passenger security screening Evaluation
2
Airlines Finance
2
Airlines Security measures
2
Airports Baggage handling
2
Automobiles Law and legislation
2
Bill drafting
2
Biometric identification
2
Business failures Law and legislation
2
Collection laws
2
Earthwork Law and legislation
2
Hazardous substances Transportation Safety measures
2
Hulls (Naval architecture) Design and construction Government policy
2
Identification cards
2
Infrastructure (Economics)
2
Motor vehicles Safety measures
2
National security
2
Natural gas pipelines Communication systems
2
Oil spills Law and legislation
2
Oil spills Prevention
2
Petroleum Transportation Law and legislation
2
Pipelines Safety measures
2
Railroads Freight Rates Law and legislation
2
Railroads, Local and light Finance
2
Terrorism Prevention
2
Terrorism Prevention Government policy
2
Transport workers Identification
2
Transportation Finance
2
Transportation Finance Law and legislation
2
more ...