Subject
Federal aid to transportation
Highway law
8
Rules and practice
5
Traffic safety Finance
4
Appropriations and expenditures
3
Infrastructure (Economics) Finance
3
Railroads Finance
3
Roads Finance Law and legislation
3
Suffrage
3
Automobiles Law and legislation
2
Corridors
2
Express highways Finance
2
Grants-in-aid
2
Metropolitan areas Planning Government policy
2
Passenger trains Finance
2
Railroads Passenger traffic Finance Law and legislation
2
Repeal of legislation
2
Roads Design and construction Finance
2
Roads Safety measures Finance
2
Roads States Finance
2
Transportation Capital investments
2
Transportation Finance Law and legislation
2
Transportation Safety measures
2
Aeronautics Safety measures Finance
1
Aeronautics Safety measures Government policy
1
Aeronautics, Commercial Law and legislation
1
Air traffic control Finance
1
Airports Finance
1
Railroads
1
Roads Finance
1
Traffic safety Government policy
1
Transit-oriented development
1
Transportation Finance
1
Transportation Law and legislation
1
Transportation and state
1
Truck drivers
1
Truck parking Costs
1
Truck parking Government policy
1
Urban transportation Law and legislation
1