Table 1 The Transportation Network: 2003

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Preface

Statistics published in this Pocket Guide to Transportation come from many different sources. Some statistics are based on samples and are subject to sampling variability. Statistics may also be subject to omissions and errors in reporting, recording, and processing.

Introduction

America’s transportation system continues to change along with the population, work force, and economy. The following table puts those changes in perspective:

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Glossary

Air carrier—Certificated provider of scheduled and nonscheduled services.

Annual delay—Extra travel time for peak period travel during the year divided by the number of travelers who begin a trip during the peak period (6 to 9 a.m. and 4 to 7 p.m.). Free-flow...

Figure 16 Index of Key Air Pollutant Emissions from U.S. Transportation: 1980-2002

Index: 1980 = 1.0, 1990 = 1.0 for PM-2.5 and ammonia

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Figure 16 Index of Key Air Pollutant Emissions from U.S. Transportation: 1980-2002

Index: 1980 = 1.0, 1990 = 1.0 for PM-2.5 and ammonia

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Key: PM-10 and PM-2.5 = airborne particulates of less than 10 microns or 2.5 microns,...

Figure 15 U.S. Carbon Dioxide Emissions from Energy Use: 1980-2003

Million metric tons of carbon

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Figure 15 U.S. Carbon Dioxide Emissions from Energy Use: 1980-2003

Million metric tons of carbon

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Notes: One ton of carbon equals 3.667 tons of carbon dioxide gas. Electric utility emissions are distributed across sectors....

Figure 14 Oil Spills Reported to the U.S. Coast Guard by Sources: 1991-2001

(Gallons)

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Figure 14 Oil Spills Reported to the U.S. Coast Guard by Sources: 1991-2001

(Gallons)

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Source: U.S. Department of Transportation, Bureau of Transportation Statistics, special tabulation, based on U.S. Department of Homeland...