Greenhouse Gas Emissions

The transportation sector’s greenhouse gas (GHG) emissions in 2002 totaled 1,861.4 teragrams of carbon dioxide equivalent (TgCO2Eq), 27 percent of total U.S. GHG emissions.1 Transportation emissions have grown 22 percent since 1992, while total U.S. emissions...

Figure 4-1 - Number of Trucks by Vehicle Weight: 1992 and 1997

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NOTES: Weight is the empty weight of the vehicle plus the average vehicle load.

Excludes vehicles owned by federal, state, or local governments;...

Merchant Marine Vessel Capacity

Merchandise trade valued at over $729 billion moved by maritime vessels between U.S. and foreign seaports in 2002 [2]. Container shipments increased 86 percent between 1992 and 20021 [3].

The average capacity of containerships calling at U.S. ports...

Age of Highway and Transit Fleet Vehicles

The median age of the automobile fleet in the United States increased appreciably, by 20 percent, from 7.0 years in 1992 to 8.4 years in 2002. The median age of the truck fleet,1 by contrast, began to increase in the early 1990s but has been declining...

Figure 9-8 - Minor Motor Vehicle-Related Injuries by Age and Gender: 2002

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NOTES: A minor injury is one in which the victim was treated and released. A serious injury is one in which the victim was either hospitalized or treated and...

Transportation Injury Rates - Box 9-C

Each transportation mode tends to define injury differently. In addition, each mode may generate its injury data using different methods. Therefore, comparisons across modes should be viewed very carefully. For further information on...

Urban Highway Travel Times

Highway travel times increased between 1991 and 2001 in 72 of the 75 urban areas studied by the Texas Transportation Institute. The average Travel Time Index (TTI) for these areas in 2001 was 1.39, an increase from 1.29 in 1991 [2]. This means that in 2001 it took...

Figure 5-15 - Share of Daily Trips by Age Group by Mode: 2001

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SOURCE: D.V. Collia, J. Sharp, and L. Giesbrecht, “The 2001 National Household Travel Survey: A Look Into the Travel Patterns of Older Americans,” Journal of...

Motor Vehicle-Related Injuries - Box 9-D

Use of NEISS data from the U.S. Consumer Product Safety Commission (CPSC) enables analyses of injuries by factors such as age and gender, type of vehicle, and severity of injuries...

Figure 5-16 - Daily Trips by Age Group and Time of Day: 2001

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SOURCE: D.V. Collia, J. Sharp, and L. Giesbrecht, “The 2001 National Household Travel Survey: A Look Into the Travel Patterns of Older Americans,” Journal of Safety...