TABLE 15-3a Change in Carbon Dioxide Emissions by Mode: 1993-2003

Monday, September 10, 2012

1993 = 100

	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003
Passenger cars	100	101	101	102	102	105	106	107	107	109	108
Light-duty trucks	100	102	106	110	113	116	120	121	122	125	128
All other trucks	100	107	111	117	123	128	134	141	144	144	150
Buses	100	105	104	111	114	117	130	128	121	115	112
Total highway	100	102	105	108	110	113	116	118	119	121	123
Aircraft	100	105	102	107	106	108	111	115	109	104	102
Ships and boats	100	99	102	99	71	60	78	116	79	106	106
Locomotives	100	108	112	117	115	116	120	120	123	118	123
Other	100	108	109	110	116	104	106	105	99	105	100
Total, all modes	100	103	105	107	108	110	114	117	116	118	119
International bunker fuels	100	102	106	108	115	112	111	111	107	97	91

NOTES: To make it easier to compare data of differing magnitudes over time, the Bureau of Transportation Statistics divided the data for all years in each category (see table 15-3b) by the initial year value and multiplied the result by 100.

Highway total includes passenger cars, buses, light-duty trucks, and other trucks. Other carbon dioxide emissions are from motorcycles, construction equipment, agricultural machinery, pipelines, and lubricants. International bunker fuel emissions (not included in the total) result from the combustion of fuels purchased in the United States but used for international aviation and maritime transportation. Thus, aircraft and ships and boats data included in U.S. total emissions involve only domestic activities of these modes as do all other data shown. The large annual variations in ships and boats data may result from methodological problems related to the domestic/international partition of maritime emissions. Economic factors may also contribute.

Aircraft emissions consist of emissions from all jet fuel (less bunker fuels) and aviation gas consumption. Alternative-fuel vehicle emissions are allocated to the specific vehicle types in which they were classified (i.e., passenger cars, light-duty trucks, and other trucks and buses).

SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, calculations using data in table 15-3b.

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TABLE 15-3a Change in Carbon Dioxide Emissions by Mode: 1993-2003

TABLE 15-3a Change in Carbon Dioxide Emissions by Mode: 1993-2003