Subject
Federal aid to transportation
489
Transportation and state
142
Appropriations and expenditures
122
Transportation
100
Transportation Finance
95
Infrastructure (Economics) Finance
91
Transportation Planning
87
Roads Finance
86
Highway law
49
Roads Finance Law and legislation
44
Transportation Law and legislation
44
Rules and practice
39
Transportation Safety measures
39
Infrastructure (Economics)
38
Transportation Finance Law and legislation
32
Transportation Capital investments
26
Local transit Finance
25
Public-private sector cooperation
24
Freight and freightage
21
Hazardous substances Transportation Safety measures
19
People with disabilities Transportation
19
Aeronautics, Commercial Law and legislation
17
Railroads Finance
17
Traffic safety
17
Federal aid to housing
16
Commuting
15
Roads States Finance
15
Transportation Environmental aspects
15
Local transit
14
Highway planning
13
Inland water transportation
13
Motor fuels Taxation
13
Older people Transportation
13
Traffic safety Finance
13
Grants-in-aid
12
Hazardous substances Transportation
12
Management
12
Shipment of goods
12
Air quality management
11
Choice of transportation
11
Employer-sponsored transportation
11
Local transit Finance Law and legislation
11
Railroads Passenger traffic
11
Transportation, Automotive Law and legislation
11
Urban transportation
11
Federal aid to transportation States
10
Hazardous substances Transportation Law and legislation
10
Railroad law
10
Radioactive substances Transportation
9
Railroads Freight
9
more ...