Table 1-4 - U.S.-Flag Waterborne Cargo-Carrying Vessel Fleet Profile: 1997

Figure 1-2 - Registered Highway Vehicle Trends: 1987-97

1 Includes vans, light trucks, and sport utility vehicles.

2 Includes all single-unit trucks with at least 2 axles and 6 tires.

KEY: P = preliminary.

SOURCES:...

Figure 1-3 - Trends in Directional Route-Miles by Mass Transit 1992-97

a Includes ferry boats, trolley buses, and modes not included in the other categories. It does not, however, include demand responsive vehicles, since these vehicles do not operate on a fixed route.

Figure 1-1 - Urban and Rural Roadway Mileage by Surface Type:1950-97

KEY: P = preliminary.

SOURCES: U.S. Department of Transportation, Federal Highway Administration, Highway Statistics (Washington, DC: Annual editions), table HM.

...

Table 1-3 - Highway Bridge Conditions: 1990 and 1997

Chapter One - System Extent and Condition

The U.S. transportation system makes possible a high level of personal mobility and freight activity for the nation’s 268 million residents and nearly 7 million business establishments. In 1997, they had at their disposal over 230 million...

Figure 5-9 - Modal Shares of Key Criteria Pollutants from Transportation Sources: 1997

KEY: CO = carbon monoxide; NOX = nitrogen oxides; PM-10 = particulate matter 10 microns in diameter or smaller; VOC = volatile organic compounds.

NOTES: Other nonroad...

Table 5-5 - Toxic Release Inventory Data for Transportation Equipment Manufacturing: 1996

(In pounds, except as noted)

Table 5-2 - Carbon Emissions by Sector

(Million metric tons of carbon)

Figure 5-10 - National Air Quality Trends Index for Criteria Pollutants: 1975-97

KEY: CO = carbon monoxide; NO2 = nitrogen dioxide; PM-10 = particulate matter 10 microns in diameter or smaller.

NOTES: Numbers of monitoring sites that provide raw data vary by...