Shares of Highway Vehicle-Miles Traveled by Vehicle Type, 1970–2006
The trend of using two-axle, four-tire trucks, such as pickups, vans, and sport-utility vehicles, for personal travel is evident in these data; two-axle, four-tire trucks account for 25% more travel in 2006 than in 1970, and cars account for 27% less travel in that time period
| Year | Automobiles | Motorcycles | Two-axle, four-tire trucks |
Other single-unit trucks |
Combination trucks |
Buses | Total vehicle-miles traveled (million miles) |
|---|---|---|---|---|---|---|---|
| 1970 | 82.6% | 0.3% | 11.1% | 2.4% | 3.2% | 0.4% | 1,109,724 |
| 1971 | 82.0% | 0.3% | 11.7% | 2.5% | 3.2% | 0.4% | 1,178,811 |
| 1972 | 81.1% | 0.3% | 12.4% | 2.5% | 3.2% | 0.4% | 1,259,786 |
| 1973 | 79.7% | 0.4% | 13.5% | 2.6% | 3.5% | 0.4% | 1,313,110 |
| 1974 | 78.7% | 0.4% | 14.3% | 2.6% | 3.6% | 0.4% | 1,280,544 |
| 1975 | 77.9% | 0.4% | 15.1% | 2.6% | 3.5% | 0.5% | 1,327,664 |
| 1976 | 76.9% | 0.4% | 16.1% | 2.6% | 3.5% | 0.4% | 1,402,380 |
| 1977 | 75.6% | 0.4% | 17.1% | 2.7% | 3.8% | 0.4% | 1,467,027 |
| 1978 | 74.2% | 0.5% | 18.1% | 2.8% | 4.1% | 0.4% | 1,544,704 |
| 1979 | 72.8% | 0.6% | 19.1% | 2.7% | 4.4% | 0.4% | 1,529,133 |
| 1980 | 72.8% | 0.7% | 19.0% | 2.6% | 4.5% | 0.4% | 1,527,295 |
| 1981 | 72.9% | 0.7% | 19.1% | 2.5% | 4.4% | 0.4% | 1,555,308 |
| 1982 | 72.8% | 0.6% | 19.2% | 2.5% | 4.4% | 0.4% | 1,595,010 |
| 1983 | 72.3% | 0.5% | 19.8% | 2.6% | 4.5% | 0.3% | 1,652,788 |
| 1984 | 71.3% | 0.5% | 20.8% | 2.6% | 4.5% | 0.3% | 1,720,269 |
| 1985 | 70.2% | 0.5% | 22.0% | 2.6% | 4.4% | 0.3% | 1,774,826 |
| 1986 | 69.2% | 0.5% | 23.1% | 2.5% | 4.4% | 0.3% | 1,834,872 |
| 1987 | 68.5% | 0.5% | 23.8% | 2.5% | 4.5% | 0.3% | 1,921,204 |
| 1988 | 67.6% | 0.5% | 24.8% | 2.4% | 4.4% | 0.3% | 2,025,962 |
| 1989 | 66.8% | 0.5% | 25.6% | 2.4% | 4.4% | 0.3% | 2,096,487 |
| 1990 | 65.7% | 0.4% | 26.8% | 2.4% | 4.4% | 0.3% | 2,144,362 |
| 1991 | 62.5% | 0.4% | 29.9% | 2.4% | 4.4% | 0.3% | 2,172,050 |
| 1992 | 61.0% | 0.4% | 31.5% | 2.4% | 4.4% | 0.3% | 2,247,151 |
| 1993 | 59.9% | 0.4% | 32.5% | 2.5% | 4.5% | 0.3% | 2,296,378 |
| 1994 | 59.6% | 0.4% | 32.4% | 2.6% | 4.6% | 0.3% | 2,357,588 |
| 1995 | 59.4% | 0.4% | 32.6% | 2.6% | 4.8% | 0.3% | 2,422,696 |
| 1996 | 59.1% | 0.4% | 32.8% | 2.6% | 4.8% | 0.3% | 2,485,848 |
| 1997 | 58.7% | 0.4% | 33.2% | 2.6% | 4.9% | 0.3% | 2,561,695 |
| 1998 | 58.9% | 0.4% | 33.0% | 2.6% | 4.9% | 0.3% | 2,631,522 |
| 1999 | 58.3% | 0.4% | 33.5% | 2.6% | 4.9% | 0.3% | 2,691,056 |
| 2000 | 58.3% | 0.4% | 33.6% | 2.6% | 4.9% | 0.3% | 2,746,925 |
| 2001 | 58.2% | 0.3% | 33.8% | 2.6% | 4.9% | 0.3% | 2,797,287 |
| 2002 | 58.1% | 0.3% | 33.8% | 2.7% | 4.9% | 0.2% | 2,855,508 |
| 2003 | 57.8% | 0.3% | 34.0% | 2.7% | 4.8% | 0.2% | 2,890,450 |
| 2004 | 57.3% | 0.3% | 34.6% | 2.6% | 4.8% | 0.2% | 2,964,788 |
| 2005 | 57.1% | 0.3% | 34.8% | 2.6% | 4.8% | 0.2% | 2,989,430 |
| 2006 | 55.8% | 0.4% | 36.1% | 2.7% | 4.7% | 0.2% | 3,014,116 |
Average annual percentage change |
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| 1970–2006 | 2.8% | ||||||
| 1996–2006 | 1.9% | ||||||
