Table 4-3 Vehicle-Miles

Mode	1970	1980	1990	2000	2004
Air
Air carrier	2,068	2,523	3,963	5,664	6,552
General aviation	3,207	5,204	4,548	^aN	^aN
Highway
Passenger cars	916,700	1,111,596	1,408,266	1,600,287	1,704,982
Other 2-axle, 4-tire vehicles^b	123,286	290,935	574,571	923,059	1,014,342
Motorcycles	2,979	10,214	9,557	10,469	10,048
Buses^c	4,544	6,059	5,726	7,590	6,637
Trucks:
Single-unit	27,081	39,813	51,901	70,500	81,107
Combination	35,134	68,678	94,341	135,020	145,398
Rail^d:
Transit^e	441	403	561	648	^P710
Commuter	N	179	213	271	^P295
Intercity/Amtrak^f	690	235	301	368	308
Class 1 freight	29,890	29,277	26,159	34,590	37,071
Other transit^g	N	15	324	833	^P986
^a The Federal Aviation Administration has estimated vehicle-miles for general aviation aircraft through 1997, relying in part on hours-flown survey data. Vehicle-miles estimates for subsequent years are not yet available. ^b Includes vans, pickup trucks, sport utility vehicles, and other 2-axle, 4-tire motor vehicles that are not passenger cars. ^c Includes municipally owned transit and commercial, federal, and school buses. ^d Car-miles. ^e Includes light and heavy rail only. ^f Fiscal year data. Amtrak began operations in 1971. ^g Includes demand response, ferryboat, and other transit not specified; 1980 data include "other transit" only. Key: N = data are nonexistent; P = preliminary. Sources: Except as noted, various sources, as cited in U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, National Transportation Statistics, table 1-32, available at http://www.bts.gov, as of October 2006. 2004 transit, commuter, and other transit: American Public Transportation Association, 2006 Public Transportation Fact Book, table 12 and 15, available at http://www.apta.com/research/stats/, as of October 2006.

Air

Air carrier

2,068

2,523

3,963

5,664

6,552

General aviation

3,207

5,204

4,548

^aN

Highway

Passenger cars

916,700

1,111,596

1,408,266

1,600,287

1,704,982

Other 2-axle, 4-tire vehicles^b

123,286

290,935

574,571

923,059

1,014,342

Motorcycles

2,979

10,214

9,557

10,469

10,048

Buses^c

4,544

6,059

5,726

7,590

6,637

Trucks:

Single-unit

27,081

39,813

51,901

70,500

81,107

Combination

35,134

68,678

94,341

135,020

145,398

Rail^d:

Transit^e

441

403

561

648

^P710

Commuter

N

179

213

271

^P295

Intercity/Amtrak^f

690

235

301

368

308

Class 1 freight

29,890

29,277

26,159

34,590

37,071

Other transit^g

N

15

324

833

^P986

^a The Federal Aviation Administration has estimated vehicle-miles for general aviation aircraft through 1997, relying in part on hours-flown survey data. Vehicle-miles estimates for subsequent years are not yet available.

^b Includes vans, pickup trucks, sport utility vehicles, and other 2-axle, 4-tire motor vehicles that are not passenger cars.

^c Includes municipally owned transit and commercial, federal, and school buses.

^d Car-miles.

^e Includes light and heavy rail only.

^f Fiscal year data. Amtrak began operations in 1971.

^g Includes demand response, ferryboat, and other transit not specified; 1980 data include "other transit" only.

Key: N = data are nonexistent; P = preliminary.

Sources: Except as noted, various sources, as cited in U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, National Transportation Statistics, table 1-32, available at http://www.bts.gov, as of October 2006.

2004 transit, commuter, and other transit: American Public Transportation Association, 2006 Public Transportation Fact Book, table 12 and 15, available at http://www.apta.com/research/stats/, as of October 2006.

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Table 4-3 Vehicle-Miles

Table 4-3 Vehicle-Miles