1-1 The Transportation Network: 2005

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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.

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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.

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

Figure 6-4 Index of Key Air Pollutant Emissions from U.S. Transportation: 1990-2003

Index: 1990 = 1.0

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Figure 6-4 Index of Key Air Pollutant Emissions from U.S. Transportation: 1990-2003

Index: 1990 = 1.0

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

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Figure 6-2 U.S. Carbon Dioxide Emissions from Energy Use: 1985-2005

Million metric tons of carbon

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Figure 6-2 U.S. Carbon Dioxide Emissions from Energy Use: 1985-2005

Million metric tons of carbon

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Notes: 2005 data are preliminary.

One ton of carbon equals 3.667 tons of carbon dioxide gas. Electric...

Figure 6-1 New Passenger Car and Light Truck Fuel Economy Averages: Model Years 1985-2006

Miles per gallon

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Figure 6-1 New Passenger Car and Light Truck Fuel Economy Averages: Model Years 1985-2006

Miles per gallon

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Note: 2005 data are revised from the previous edition. 2006 data are preliminary.

Source: U.S....