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Infrastructure Functions Benefits Provided Arterial management Monitor...Source: U.S. Department of Transportation, Office of International Aviation, personal communication, Apr. 20, 2000.
Source: Federal Bureau of Investigation, Terrorism in the United States1997 (Washington, DC: 2000), p.3.
Source: U.S. Department of Transportation, Federal Highway Administration, Summary of Travel Trends: 1995 Nationwide Personal Transportation...
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1970-79 1980-89 1990-98 Linear length (km) 281 925 1,397...Source: U.S. Department of Commerce, U.S. Census Bureau, Statistical Abstract of the United States (Washington, DC: 1998); U.S. Department of...
Source: U.S. Department of Transportation, Bureau of Transportation Statistics, Transborder Surface Freight data (Washington, DC: Various years), available...
Source: U.S. Department of Transportation, Bureau of Transportation Statistics, National Transportation Statistics 1999 (Washington...
Source: U.S. Environmental Protection Agency, Office of Air and Radiation, Air Quality Planning and Standards, National...
Source: U.S. Department of Transportation, Federal Highway Administration, 1995 Nationwide Personal Transportation Survey data (Washington...