BOX 5-A - Travel Time Index

Developed by the Texas Transportation Institute, the Travel Time Index is the ratio of peak period travel time to free-flow travel time. A value of 1.0 indicates that traffic is moving freely. A value of 1.3 indicates that it takes 30 percent...

Figure 13-3 - Loadings on Urban Interstate Highways by Vehicle Type: 2003

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NOTES: Based on data from the Truck Weight Study that are collected by the states for varying time periods each year and are not adjusted to typify annual...

Figure 1-9 - Change in Domestic Freight Ton-Miles by Mode: 1992-2002

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NOTE: To make it easier to compare data of differing magnitudes over time, the Bureau of Transportation Statistics divided the data for all years in each category (...

Rail Freight Times

Class I rail freight line-haul speeds averaged 21.8 miles-per-hour in the first-quarter of 2005, a decrease of 1.5 percent from the previous quarter1 (figure 5-12). Between the first quarter of 2002 and the first quarter of 2005, average line-haul speeds...

Amtrak On-Time Performance

Seventy-one percent of Amtrak trains arrived at their final destination on time in 2004 [2]. This was below the system's performance peak of 76 percent in 2002 (figure 5-10). Amtrak counts a train as delayed if it arrives at least 10 to 30 minutes...

Figure 14-1 - U.S. Energy Consumption by Sector: 1994-2004

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KEY: Btu = British thermal units; GDP = Gross Domestic Product (in chained 2000 dollars).

SOURCES: U.S. Department of Energy (USDOE), Energy Information...

Passenger-Miles of Travel

Estimated U.S. passenger-miles of travel (pmt) increased 27 percent between 1992 and 2002 to total 5.0 trillion in 2002, an average of about 17,000 miles for every man, woman, and child (box 1-A) [2].

Almost 87 percent of pmt in 2002 was in...

Figure 15-5 - Oil Spills Reported to the U.S. Coast Guard by Source: 1991-2001

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SOURCES: U.S. Department of Transportation, Research and Innovative Technology Admin­istration, Bureau of Transportation Statistics calculations, using...

Figure 14-3 - U.S. Petroleum Use by Sector: 1993-2003

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NOTE: 2003 data are estimates, except for utilities, which are preliminary.

SOURCE: USDOE, EIA, Annual Energy Review 2003, table 5.13a-d, available at http://...

Figure 2-4 - Urban Roads in Poor or Mediocre Condition by Functional Class: 1993-2003

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NOTES: Data are for the 50 states and the District of Columbia. The terms poor and mediocre as used here are Federal Highway Administration...