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Intercity air, bus and rail schedules in many major intercity markets are tending to grow longer. Between February 1995 and February 2002, advertised travel times in selected city-pairs experienced varying degrees of schedule lengthening in most service...
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KEY: apt. = apartment; condo = condominium.
SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics...
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NOTES: Air includes commercial and general aviation. Waterborne includes commercial and recreational vessels. Commercial aviation data...
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NOTE: Support includes offshore support and crewboats. Liquid barge includes tank barges.
SOURCE: U.S. Department of...
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NOTES: Percentages may not add to 100 due to rounding.
Loadings are based on equivalent single-axle loads (ESALs), a...
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SOURCES: Passenger-miles, ton-miles, and energy use (unless otherwise noted)—U.S. Department of Transportation, Bureau of...
Work zones on freeways cause an estimated 24 percent of the nonrecurring delays on freeways and principal arterials [1]. According to the Federal Highway Administration, the purpose of maintenance—which includes restoration, resurfacing, minor widening,...
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1 Teragrams of CO2 equivalent—1 TgCO2 Eq = 1 million metric ton of carbon equivalent x (44/12). A teragram = 1 trillion grams....
Excluding gas pipelines, all modes of freight transportation, combined, generated nearly 4 trillion domestic ton-miles in 2000, 20 percent more than in 1990. This represents an average growth rate of almost 2 percent per year during the decade [1].
Domestic...
There were an estimated 3.6 million highway-related injuries in the United States in 2001, according to data reported to the U.S. Consumer Product Safety Commission (CPSC)1 (see box) [1]. An estimated 3.3 million of these injuries involved motor vehicle...