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The U.S. working poor1 totaled more than 9 million (6 percent of all workers) in 1999 [1]. Half of these workers spent almost 10 percent of their income on commuting expenses in that year2 (figure 39). This is over twice the percentage of income that...
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NOTES: Labor productivity for transportation measures quality-adjusted ton- and passenger-miles per hour. Quality adjustment corrects for differences in...
Merchandise trade valued at over $718 billion moved by maritime vessels between U.S. and foreign seaports in 2001 [2]. Container shipments increased 71 percent between 1992 and 20011 [3].
The average capacity of containerships calling at U.S. ports...
Because of improvements in the longevity of passenger cars, the median age of the automobile fleet in the United States has increased significantly, from 7.0 years in 1992 to 8.4 years in 2002. The median age of the truck fleet,1 by contrast, began...
The data presented here are based on an analysis by the Bureau of Transportation Statistics (BTS) of the U.S. Census Bureau’s Survey of Income and Program Participation (SIPP) (availableat http://www.sipp. census.gov/...
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KEY: N = data are nonexistent; NPIAS = National Plan of Integrated Airport Systems.
SOURCE: U.S. Department of Transportation, Bureau of...
Highway travel times increased between 1990 and 2000 in 70 of the 75 urban areas studied by the Texas Transportation Institute. The average Travel Time Index (TTI) for these areas in 2000 was 1.39, an increase from 1.31 in 1990 [2]. This means that in 2000, it took...
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NOTE: Locomotive data are for Class I railroads only. Freight car data cover Class I railroads, other railroads, and private car owners.
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NOTES: 1999 is the most recent year for which these data are available by country. For these...
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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...