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

Americas 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 between...

6-4 Index of Key Air Pollutant Emissions from U.S. Transportation: 1990-2008

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Index: 1990 = 1.0

6-4 Index of Key Air Pollutant Emissions from U.S. Transportation: 1990-2008

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Index: 1990 = 1.0

Key: R = revised, PM-10 = airborne particulates of less than 10 microns, PM-2.5 = airborne particulates of less than 2.5 microns, U...

6-2 U.S. Carbon Dioxide Emissions from Energy Use: 1985-2008

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Million metric tons of carbon

6-2 U.S. Carbon Dioxide Emissions from Energy Use: 1985-2008

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Key: R = Revised.

Notes: 2008 data are preliminary. One ton of carbon equals 3.667 tons of carbon dioxide gas. Electric utility emissions are distributed...

6-1 New Passenger Car and Light Truck Fuel Economy Averages: Model Years 1985-2009

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Miles per gallon

6-1 New Passenger Car and Light Truck Fuel Economy Averages: Model Years 1985-2009

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Notes: Fuel economy is miles divided by gallons. 2008 data are revised.

Source: U.S. Environmental Protection Agency, Light-Duty...

5-10 New Passenger Car and Light Truck Sales: Model Years 1985-2009

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Millions of vehicles