Subject
Federal aid to transportation
156
Appropriations and expenditures
29
Transportation and state
25
Roads Finance
24
Roads Finance Law and legislation
22
Highway law
20
Transportation Finance Law and legislation
20
Infrastructure (Economics) Finance
15
Local transit Finance
9
Transportation, Automotive Law and legislation
9
Interstate Highway System
7
Local transit Finance Law and legislation
6
Local transit Law and legislation
6
Transportation Finance
6
Aeronautics, Commercial Law and legislation
5
Highway planning
5
Railroads Finance
5
Roads States Finance
5
Rules and practice
5
Express highways Law and legislation
4
Highway planning Law and legislation
4
Local transit
4
Motor fuels Taxation
4
Railroad tracks
4
Traffic safety Finance
4
Transportation Law and legislation
4
Transportation Planning
4
Transportation Safety measures
4
Transportation States Finance
4
Administrative agencies Appropriations and expenditures
3
Express highways
3
Federal aid to housing
3
Federal aid to transportation States
3
Finance
3
Freight and freightage
3
High speed trains Finance Law and legislation
3
Management
3
Traffic regulations
3
Traffic safety
3
Aeronautics Safety measures
2
Aeronautics, Commercial Safety regulations
2
Bridges Design and construction Finance
2
Economic stabilization Government policy
2
Electric railroads Maintenance and repair
2
Federal aid to transportation Evaluation
2
Government purchasing
2
High speed ground transportation Law and legislation
2
Indian reservations
2
Indian roads Maintenance and repair Finance
2
Indians of North America Transportation
2
more ...