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Table 4-22: Energy Intensity of Passenger Cars, Other 2-Axle 4-Tire Vehicles, and Motorcycles
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Vehicle-miles (millions) |
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Passenger car |
587,000 |
723,000 |
917,000 |
1,034,000 |
1,112,000 |
1,247,000 |
1,408,000 |
1,358,000 |
1,372,000 |
1,375,000 |
1,406,000 |
1,438,000 |
1,470,000 |
1,503,000 |
1,550,000 |
1,569,000 |
1,600,287 |
1,628,332 |
1,658,474 |
1,672,079 |
1,699,890 |
1,708,421 |
1,682,671 |
Other 2-axle 4-tire vehicle |
N |
N |
123,000 |
201,000 |
291,000 |
391,000 |
575,000 |
649,000 |
707,000 |
746,000 |
765,000 |
790,000 |
817,000 |
851,000 |
868,000 |
901,000 |
923,059 |
943,207 |
966,034 |
984,094 |
1,027,164 |
1,041,051 |
1,089,013 |
Motorcycle |
b |
b |
3,000 |
5,600 |
10,200 |
9,100 |
9,600 |
9,200 |
9,600 |
9,900 |
10,200 |
9,800 |
9,900 |
10,100 |
10,300 |
10,600 |
10,469 |
9,639 |
9,552 |
9,577 |
10,122 |
10,454 |
12,401 |
Passenger-miles (millions)a |
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Passenger car |
1,145,000 |
1,395,000 |
1,751,000 |
1,954,000 |
2,012,000 |
2,094,000 |
2,282,000 |
2,200,000 |
2,208,000 |
2,213,000 |
2,250,000 |
2,287,000 |
2,337,000 |
2,389,000 |
2,464,000 |
2,495,000 |
2,544,457 |
2,556,481 |
2,620,389 |
2,641,885 |
2,685,827 |
2,699,305 |
2,658,621 |
Other 2-axle 4-tire vehicle |
N |
N |
226,000 |
363,000 |
521,000 |
688,000 |
1,000,000 |
1,117,000 |
1,202,000 |
1,253,000 |
1,269,000 |
1,256,000 |
1,298,000 |
1,353,000 |
1,381,000 |
1,433,000 |
1,467,664 |
1,678,853 |
1,674,792 |
1,706,103 |
1,780,771 |
1,804,848 |
1,887,997 |
Motorcycle |
b |
b |
3,000 |
6,000 |
12,000 |
12,000 |
12,000 |
12,000 |
12,000 |
12,000 |
12,000 |
11,000 |
11,000 |
11,000 |
11,000 |
12,000 |
11,516 |
11,760 |
12,131 |
12,163 |
12,855 |
13,277 |
15,750 |
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 gallons) |
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Passenger car |
41,171 |
49,723 |
67,819 |
74,140 |
69,982 |
71,518 |
69,568 |
64,317 |
65,436 |
67,048 |
67,874 |
68,072 |
69,221 |
69,892 |
71,695 |
73,283 |
73,065 |
73,559 |
75,471 |
75,455 |
75,402 |
77,419 |
74,983 |
Other 2-axle 4-tire vehicle |
N |
N |
12,313 |
19,081 |
23,796 |
27,363 |
35,611 |
38,217 |
40,929 |
42,851 |
44,112 |
45,605 |
47,354 |
49,388 |
50,462 |
52,859 |
52,939 |
53,522 |
55,220 |
60,758 |
63,417 |
58,869 |
60,662 |
Motorcycle |
b |
b |
60 |
113 |
204 |
182 |
191 |
184 |
191 |
198 |
205 |
196 |
198 |
202 |
206 |
212 |
209 |
193 |
191 |
192 |
202 |
189 |
220 |
Energy intensity (Btu/passenger-mile)c |
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Passenger car |
4,495 |
4,455 |
4,841 |
4,743 |
4,348 |
4,269 |
3,811 |
3,654 |
3,704 |
3,787 |
3,771 |
3,721 |
3,702 |
3,657 |
3,637 |
3,671 |
3,589 |
3,597 |
3,600 |
3,570 |
3,509 |
3,585 |
3,525 |
Other 2-axle 4-tire vehicle |
N |
N |
6,810 |
6,571 |
5,709 |
4,971 |
4,451 |
4,277 |
4,256 |
4,275 |
4,345 |
4,539 |
4,560 |
4,563 |
4,568 |
4,611 |
4,509 |
3,985 |
4,121 |
4,452 |
4,452 |
4,077 |
4,016 |
Motorcycle |
b |
b |
2,500 |
2,354 |
2,125 |
1,896 |
1,990 |
1,917 |
1,990 |
2,063 |
2,135 |
2,227 |
2,250 |
2,295 |
2,341 |
2,205 |
2,273 |
2,049 |
1,969 |
1,969 |
1,969 |
1,779 |
1,746 |
KEY: Btu = British thermal unit; N = data do not exist; R =
revised.
b Included in passenger car.
c Energy Intensity (Btu/passenger-mile) is calculated by converting the fuel consumption in gallons to the energy equivalent Btu units and dividing by the passenger-miles. The heat equivalent factor used for Btu conversion is 125,000 Btus/gallon.
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.
1995-2005: 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.
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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