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Table 4-22M: Energy Intensity of Passenger Cars, Other 2-Axle 4-Tire Vehicles, and Motorcycles
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Vehicle-kilometers (millions) |
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Passenger car |
944,685 |
1,163,556 |
1,475,768 |
1,664,062 |
1,789,591 |
2,006,852 |
2,265,956 |
2,185,489 |
2,208,020 |
2,212,848 |
2,262,738 |
2,314,237 |
2,365,736 |
2,418,844 |
2,494,483 |
2,525,061 |
2,575,412 |
2,620,546 |
2,669,055 |
2,690,950 |
2,735,708 |
2,749,437 |
2,707,996 |
Other 2-axle 4-tire vehicle |
N |
N |
197,949 |
323,478 |
468,319 |
629,254 |
925,373 |
1,044,464 |
1,137,806 |
1,200,571 |
1,231,148 |
1,271,382 |
1,314,834 |
1,369,552 |
1,396,911 |
1,450,019 |
1,485,519 |
1,517,945 |
1,554,681 |
1,583,746 |
1,653,060 |
1,675,409 |
1,752,597 |
Motorcycle |
b |
b |
4,828 |
9,012 |
16,415 |
14,645 |
15,450 |
14,806 |
15,450 |
15,933 |
16,415 |
15,772 |
15,933 |
16,254 |
16,576 |
17,059 |
16,848 |
15,512 |
15,372 |
15,413 |
16,290 |
16,824 |
19,957 |
Passenger-kilometers (millions)a |
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Passenger car |
1,842,699 |
2,245,035 |
2,817,961 |
3,144,658 |
3,238,000 |
3,369,966 |
3,672,523 |
3,540,557 |
3,553,432 |
3,561,478 |
3,621,024 |
3,680,570 |
3,761,037 |
3,844,723 |
3,965,424 |
4,015,313 |
4,094,907 |
4,114,257 |
4,217,107 |
4,251,702 |
4,322,420 |
4,344,110 |
4,278,636 |
Other 2-axle 4-tire vehicle |
N |
N |
363,712 |
584,192 |
838,468 |
1,107,229 |
1,609,344 |
1,797,637 |
1,934,431 |
2,016,508 |
2,042,258 |
2,021,336 |
2,088,929 |
2,177,442 |
2,222,504 |
2,306,190 |
2,361,976 |
2,701,852 |
2,695,316 |
2,745,707 |
2,865,873 |
2,904,621 |
3,038,437 |
Motorcycle |
b |
b |
4,828 |
9,656 |
19,312 |
19,312 |
19,312 |
19,312 |
19,312 |
19,312 |
19,312 |
17,703 |
17,703 |
17,703 |
17,703 |
19,312 |
18,533 |
18,926 |
19,523 |
19,574 |
20,688 |
21,367 |
25,347 |
Average occupancy rate |
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Passenger car |
1.95 |
1.93 |
1.91 |
1.89 |
1.81 |
1.68 |
1.62 |
1.62 |
1.61 |
1.61 |
1.60 |
1.59 |
1.59 |
1.59 |
1.59 |
1.59 |
1.59 |
1.57 |
1.58 |
1.58 |
1.58 |
1.58 |
1.58 |
Other 2-axle 4-tire vehicle |
N |
N |
1.84 |
1.81 |
1.79 |
1.76 |
1.74 |
1.72 |
1.70 |
1.68 |
1.66 |
1.59 |
1.59 |
1.59 |
1.59 |
1.59 |
1.59 |
1.78 |
1.73 |
1.73 |
1.73 |
1.73 |
1.73 |
Motorcycle |
b |
b |
1.00 |
1.07 |
1.18 |
1.32 |
1.25 |
1.30 |
1.25 |
1.21 |
1.18 |
1.12 |
1.11 |
1.09 |
1.07 |
1.13 |
1.10 |
1.22 |
1.27 |
1.27 |
1.27 |
1.27 |
1.27 |
Fuel consumed (million liters) |
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Passenger car |
155,849 |
188,222 |
256,723 |
280,650 |
264,911 |
270,725 |
263,344 |
243,466 |
247,702 |
253,804 |
256,931 |
257,681 |
262,030 |
264,570 |
271,395 |
277,406 |
276,582 |
278,450 |
285,690 |
285,627 |
285,427 |
293,063 |
283,841 |
Other 2-axle 4-tire vehicle |
N |
N |
46,610 |
72,229 |
90,078 |
103,580 |
134,802 |
144,667 |
154,933 |
162,209 |
166,982 |
172,634 |
179,254 |
186,954 |
191,019 |
200,093 |
200,395 |
202,602 |
209,031 |
229,994 |
240,060 |
222,843 |
229,631 |
Motorcycle |
b |
b |
227 |
428 |
772 |
689 |
723 |
697 |
723 |
750 |
776 |
742 |
750 |
765 |
780 |
801 |
793 |
730 |
723 |
725 |
766 |
715 |
833 |
Energy intensity (Btu/passenger-kilometer)c |
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Passenger car |
2,793 |
2,768 |
3,008 |
2,947 |
2,702 |
2,653 |
2,368 |
2,271 |
2,302 |
2,353 |
2,343 |
2,312 |
2,301 |
2,272 |
2,260 |
2,281 |
2,230 |
2,235 |
2,237 |
2,218 |
2,181 |
2,228 |
2,191 |
Other 2-axle 4-tire vehicle |
N |
N |
4,232 |
4,083 |
3,548 |
3,089 |
2,766 |
2,657 |
2,645 |
2,656 |
2,700 |
2,820 |
2,834 |
2,835 |
2,838 |
2,865 |
2,802 |
2,476 |
2,561 |
2,766 |
2,766 |
2,533 |
2,496 |
Motorcycle |
a |
a |
1,553 |
1,463 |
1,320 |
1,178 |
1,236 |
1,191 |
1,236 |
1,282 |
1,327 |
1,384 |
1,398 |
1,426 |
1,455 |
1,370 |
1,412 |
1,273 |
1,223 |
1,223 |
1,223 |
1,106 |
1,085 |
KEY: Btu = British thermal unit; N = data do not exist; R =
revised.
b Included in passenger car.
c Energy Intensity (Btu/passenger-kilometer) is calculated by converting the fuel consumption in liters to the energy equivalent Btu units and dividing by the passenger-miles. The heat equivalent factor used for Btu conversion is 33,021.5046605 Btus/liter.
NOTES:
In 1995, the U.S. Department of Transportation, Federal Highway Administration revised its vehicle type categories for 1993 and later data.
These new categories include passenger car, other 2-axle 4-tire vehicle, single-unit 2-axle 6-tire or more truck, and combination truck.
Other 2-axle 4-tire vehicle includes vans, pickup trucks, and sport utility vehicles. In previous years, some minivans and sport utility vehicles were included in the passenger car category. Single-unit 2-axle 6-tire or more trucks are on a single frame with at least 2 axles and 6 tires. Pre-1993 data have been reassigned to the closest available category.
Vehicle-miles and passenger-miles data for 1960 through 1999 have been rounded to the nearest billion miles.
SOURCES:
Vehicle-miles:
Passenger car:
1960-94: U.S. Department of Transportation, Federal Highway Administration, Highway Statistics Summary to 1995, FHWA-PL-97-009 (Washington, DC: July 1997), table VM-201A.
1995-2006: Ibid., Highway Statistics (Washington, DC: Annual issues), table VM-1.
Other 2-axle 4-tire vehicle:
1970-94: Ibid., Highway Statistics, Summary to 1985 (Washington, DC: 1986), table VM-201A.
1995-2006: Ibid., Highway Statistics (Washington, DC: Annual issues), table VM-1.
Motorcycle:
1970-94: Ibid., Highway Statistics, Summary to 1985 (Washington, DC: 1986), table VM-201A.
For 1970-94, the unrevised motorcycle vehicle-miles are subtracted from the combined passenger car and motorcycle vehicle-miles from VM-201A.
1995-2006: Ibid., Highway Statistics (Washington, DC: Annual issues), table VM-1.
Passenger-miles:
1960-97: Vehicle-miles multiplied by vehicle occupancy rates.
1998-2006: Ibid., Highway Statistics (Washington, DC: Annual issues), table VM-1.
Fuel consumed:
1960-94: U.S. Department of Transportation, Federal Highway Administration, Highway Statistics Summary to 1995, FHWA-PL-97-009 (Washington, DC: July 1997), table VM-201A.
For 1970-94, the unrevised motorcycle fuel consumed is subtracted from the combined passenger car and motorcycle fuel consumed from VM-201A.
1995-2006: Ibid., Highway Statistics (Washington, DC: Annual issues), table VM-1.
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