Author
Library of Congress. Congressional Research Service,
77
United States. Congress. House. Committee on Transportation and Infrastructure
48
United States. Congress. Senate. Committee on Environment and Public Works,
47
United States. Bureau of Transportation Statistics
33
United States. Federal Highway Administration
29
United States. Congress. House. Committee on Transportation and Infrastructure,
28
Mallett, William,
27
Kirk, Robert S.,
24
United States. Congress. Senate. Committee on Commerce, Science, and Transportation
23
United States,
22
United States. Congress. Senate. Committee on Commerce, Science, and Transportation,
22
United States. Congress. Senate. Committee on Environment and Public Works
22
United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Highways and Transit (2001-2003)
19
United States. Congressional Budget Office
16
National Renewable Energy Laboratory (U.S.),
15
United States. Bureau of Transportation Statistics,
15
United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Highways and Transit (2007- ),
15
United States. Department of Transportation
15
Peterman, David Randall,
14
United States. Government Accountability Office
12
United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Highways, Transit, and Pipelines
11
United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Railroads, Pipelines, and Hazardous Materials,
11
United States. Congress. Senate. Committee on Appropriations. Subcommittee on Transportation and Housing and Urban Development, and Related Agencies,
11
United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Surface Transportation and Merchant Marine Infrastructure, Safety, and Security,
11
United States
10
United States. Congress. Senate. Committee on Banking, Housing, and Urban Affairs
10
United States. Congress. Senate. Committee on Banking, Housing, and Urban Affairs,
10
Frittelli, John,
9
United States. Congress. House. Committee on Appropriations. Subcommittee on Transportation, Housing and Urban Development, and Related Agencies,
9
United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Railroads, Pipelines, and Hazardous Materials
9
United States. Federal Highway Administration,
9
Geological Survey (U.S.)
8
United States. Congress
8
United States. Congress. Senate. Committee on Appropriations,
8
United States. Congress. Senate. Committee on Environment and Public Works. Subcommittee on Transportation and Infrastructure
8
United States. Congress. Senate. Committee on Environment and Public Works. Subcommittee on Transportation and Infrastructure,
8
United States. Congressional Budget Office,
8
United States. Environmental Protection Agency. Office of Transportation and Air Quality,
8
United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Highways and Transit (2007- )
7
United States. Congress. Senate. Committee on Banking, Housing, and Urban Affairs. Subcommittee on Housing, Transportation, and Community Development,
7
United States. Government Accountability Office,
7
Goldman, Ben,
6
United States. Administration on Aging
6
United States. Congress. House. Committee on Rules
6
United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Aviation
6
United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Railroads
6
United States. Congress. Senate. Committee on Finance,
6
United States. Department of Transportation,
6
John A. Volpe National Transportation Systems Center (U.S.)
5
McCarty, Maggie,
5
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