Figure 14 - Change in Travel Time Index by Metro Area Population for 75 Metro Areas: 1990-2000

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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...

Figure 101 - Percentage Share of Transportation-Related Final Demand by Type: 1990-2001

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NOTES: Total transportation-related final demand is the sum of all consumer, private business, and government purchases of...

Oil Spills into U.S. Waters

Transportation-related sources typically account for most oil reported to be spilled into U.S. waters reported each year.1 For instance, transportation’s share of the total volume of oil spilled between 1991 and 2000 varied from a high of 97 percent in 1996...

Oil Spills into U.S. Waters - Box

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...

Figure 86 - Rural Bridge Condition by Functional Class: 2001

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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...

Figure 87 - Urban Bridge Condition by Functional Class: 2001

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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...

Average Transit Fares

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...

Figure 74 - Nitrogen Oxide Emissions by Mode: 1991-2001

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SOURCE: U.S. Environmental Protection Agency (EPA), Office of Air Quality Planning and Standards, National Emissions Inventory, Air Pollutant...

Figure 4 - Share of Passenger-Miles by Mode: 2000

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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...

Figure 21 - Average Capacity of Vessels Calling at U.S. Ports: 1998-2001

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SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics, calculation based on U.S. Department of Transportation, Maritime...