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KEY: TTI = Travel Time Index.
NOTE: The TTI is the ratio of peak period travel time to free-flow travel time. It expresses the average...
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NOTE: Data for modes not included in these figures are in table 15-7 in appendix B.
SOURCES: 1994—U.S. Department of Transportation...
Large combination trucks1 made up only 5 percent of traffic volume in urban areas, but accounted for 76 percent of loadings in 2003 (figure 13-3). On rural segments of the Interstate Highway System, these trucks represented...
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NOTES: EPA no longer estimates lead emissions. Modal shares in 2000 were: highway gasoline vehicles, 4.1%; aircraft, 95.9%. Other includes recreational boats, airport service...
There were an estimated 3.6 million motor vehicle-related injuries in the United States in 2003, according to data reported to the U.S. Consumer Product Safety Commission (CPSC)1 (box 3-C) [1]. An estimated 3.3 million of these injuries...
Approximately 78 percent of all unlinked transit passenger trips in 2003 were made within the service area of just 30 transit authorities [1]. These 30 top authorities logged 6.9 billion unlinked trips in 20031 (figure 6-5). New York City...
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NOTES: Functionally obsolete refers to bridges that do not have the lane widths, shoulder widths, or vertical clearances adequate to serve traffic demand or bridges that...
Gross government transportation investment,1 including infrastructure and vehicles, increased steadily over the last decade. The Bureau of Transportation Statistics estimates that total gross government transportation investment reached $88.8...
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NOTE: Other includes modes such as automated guideway, Alaska Railroad, cable car, ferryboat, inclined plane, monorail, trolleybus, and vanpool.
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SOURCE: Jonaki Bose, Lee Giesbrecht, Joy Sharp, Jeffery Memmott, Maha Khan, and Elizabeth Roberto, “A Picture of Long-Distance Travel Behavior of Americans Through...