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General

Legacy ID
201
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Table 1 - Highways: 2000 Data (unless noted)

Table 1 - Highways: 2000 Data (unless noted)

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Public roads

46,677 miles of Interstate highways 114,511 miles of other National Highway System (NHS) roads 3,789,927 miles of non-NHS roads

Vehicles and use

134 million cars, driven 1.6...

Figure 1 - Transit Ridership by Mode: 1990-2000

Figure 1 - Transit Ridership by Mode: 1990-2000

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NOTE: Total includes other modes not shown, such as ferry boats, inclined planes, and trolley buses.

SOURCE: American Public Transportation Association, Public...

Figure 2 - U.S. Greenhouse Gas Intensity of the U.S. Economy

Figure 2 - U.S. Greenhouse Gas Intensity of the U.S. Economy

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KEY: GDP = gross domestic product; mtce = metric tons of carbon equivalent.

SOURCES: GHG data-U.S. Department of Energy, Energy Information Administration...

International Travel To and From the United States - Box 1

International Travel To and From the United States - Box 1 Security and Travel Time Post-September 11

Immediately following September 11, the key gateways of international travel-airports and land border crossings-were affected by a sharp decline in traffic and new security concerns and...

Figure 2 - Cost of Dredging Navigable

Figure 2 - Cost of Dredging Navigable

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SOURCE: U.S. Army Corps of Engineers, Water Resources Support Center, Navigation Data Center, Dredging Information System, available at http://www.wrsc.usace.army.mil/ndc.drgmatdisp.htm, as of...

Figure 1 - Cell Phone Service Subscriptions: 1985-July 2001

Figure 1 - Cell Phone Service Subscriptions: 1985-July 2001

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NOTE: Includes all active cellular, personal communications service (PCS), and Enhanced Specialized Mobile Radio (ESMR) telephone service subscriptions. The survey excludes...