BOX 2

Two national estimates of passenger-miles of travel (pmt) are available; they differ in coverage, methodology, and other factors. The 2001 pmt data presented in this Traffic Flows section come from the Bureau of Transportation Statistics (BTS)...

Figure G - Comparison of Airfare Indexes: 1995-2003

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See chapter 2, figure 6-9, for notes and sources.

Figure A - Multifactor Productivity: 1991-2001

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See chapter 2, figure 1-3, for notes and sources.

Figure C - Shares of Domestic Freight Ton-Miles by Mode: 2001

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See chapter 2, figure 2-8, for notes and sources.

Figure K - Shares of Carbon Dioxide Emissions by Type of Highway Vehicle: 2002

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See chapter 2, figure 10-5, for notes and sources.

BOX 1

The data in this report come from a variety of sources—principally, from the Bureau of Transportation Statistics and other operating administrations of the Department of Transportation. However, other sources are federal government agencies, such as...

Figure S - Daily Trips by Time of Day: 2001

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See chapter 2, figure 5-16, for notes and sources.

Figure F - Shares of Long-Distance Trips by Mode: 2001

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See chapter 2, figure 5-3, for notes and sources.

Figure J - Serious Motor Vehicle-Related Injuries by Age and Gender: 2002

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See chapter 2, figure 9-9 for notes and sources.

Figure Q - Freight Ton-Miles, Energy Consumption, and Energy Efficiency Index: 1991-2001

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See chapter 2, figure 15-8, for notes and sources.