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The U.S. Coast Guard (USCG) summarizes reported oil spill data in its Pollution Incidents In and Around U.S. Waters, A Spill Release Compendium: 1969–2000. USCG aggregates the source data into five categories: marine vessels...
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KEY: Functionally obsolete refers to bridges that do not have the lane widths, shoulder widths, or vertical clearances adequate to serve traffic demand, or the...
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KEY: Functionally obsolete refers to bridges that do not have the lane widths, shoulder widths, or vertical clearances adequate to serve traffic demand, or the...
Transit fares remained relatively stable during the 1990s (figure 37). Increases in fares per passenger-mile for some modes of transit were offset by lower fares per passenger-mile for other modes.
Local transit bus service, which accounts for 60 percent of...
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SOURCE: U.S. Environmental Protection Agency (EPA), Office of Air Quality Planning and Standards, National Emissions Inventory, Air Pollutant...
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NOTES: Transit includes motor bus, heavy rail, commuter rail, light rail, ferryboat, trolley bus, demand responsive, and others. Motor bus and...
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SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics, calculation based on U.S. Department of Transportation, Maritime...
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KEY: GDP = Gross Domestic Product.
NOTES: For-hire transportation services include railroad transportation, local and...
Commuting—trips made to and from work—accounted for 15 percent of all personal trips in 2001. In addition, other work-related trips (e.g., travel to meetings and conferences) accounted for 3 percent of all trips. The average length of a commuting trip was 12...
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NOTE: The Travel Time Index is the ratio of peak period travel time to free-flow travel time. It expresses the average amount of...