6 - Environment

While transportation enhances the quality of our lives, it also generates environmental impacts that can lead to human health problems and ecological damage. Overall, most transportation air emissions, such as particulates, have declined since 1980 despite signifi cant...

5 - Economy

Transportation is a major sector of the U.S. economy. It moves people and goods, employs millions of workers, generates revenue, and consumes resources and services produced by other sectors of the economy. In 2005, transportation-related goods and service contributed $1.3...

4 - Mobility

The U.S. transportation network makes possible a high degree of personal mobility and freight activity. The data in this section show growth in travel and freight shipments over time. Factors infl uencing this growth include, among others: vehicle availability, travel costs,...

3 - Security

Ensuring security of all transportation systems and the people who use them is a national priority. While much of the initial national focus after the September 11, 2001, terrorist attacks was on aircraft and airports, attention is also directed at other modes, including rail,...

2 - Safety

The safety of the traveling public is of major concern for the U.S. Department of Transportation. Although progress has been made in reducing fatalities, roughly 43 percent of U.S. deaths due to unintentional injury involve transportation. Roughly 96 percent of transportation...

1 - System Extent and Use

The U.S. transportation system is an extensive, interrelated public and private network of roads, airports, railroads, transit routes, waterways, terminals, ports, and pipelines. Millions of people and businesses rely on this expanding system to get to work, embark...

Acknowledgments

Mary E. Peters Secretary

Maria Cino Deputy Secretary

John Bobo Administrator (Acting)

John O'Donnell Director (Acting)

Table 31 Wetlands Impacted and Mitigated Under the Federal-Aid Highway Program

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Table 30 Government Transportation Expenditures by Mode and Level of Government From Own Funds

(Millions of current dollars)

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Table 29 Government Transportation Revenues by Mode and Level of Government

(Millions of current dollars)

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