Table 1 The Transportation Network: 2000

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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 has changed along with the nation's society and economy. The following table puts those changes in perspective:

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Glossary

Air carrierCertificated provider of scheduled and nonscheduled services.

Chained dollarsA method to measure real changes in dollar values between years that uses chain-type indices, rather than constant dollars. The method first calculates the real changes between adjacent...

Figure 11 Index of Key Air Pollutant Emissions from U.S. Transportation: 1970-99

Index: 1970 = 1.0, 1990 = 1.0 for PM-2.5 and ammonia

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Figure 11 Index of Key Air Pollutant Emissions from U.S. Transportation: 1970-99

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Key: NOx = oxides of nitrogen; PM-10 and PM-2.5 = airborne particulates of less than 10 microns or 2.5 microns, respectively; CO = carbon monoxide; VOC...

Figure 10 New Passenger Car and Light Truck Fuel Economy Averages: Model Years 1978-2000

(Miles per gallon)

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Figure 10 New Passenger Car and Light Truck Fuel Economy Averages: Model Years 1978-2000

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Source: U.S. Department of Transportation, National Highway Traffic Safety Administration,

Automotive Fuel Economy Program,...

Figure 9 U.S. Carbon Dioxide Emissions from Energy Use

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Key: P = 2000 data are preliminary.

Notes: One ton of carbon equals 3.667 tons of carbon dioxide gas. Electric utility emissions are spread across end-user...

Figure 9 U.S. Carbon Dioxide Emissions from Energy Use

(Million metric tons of carbon)

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