1992 = 100
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 14-8b) by the
initial year value and multiplied the result by 100.
Ton-miles is the sum of individual ton-miles for air carriers, intercity trucks, Class I rail, and domestic water transportation. Energy consumption is the sum of usage by air carriers, single unit 2-axle 6-tire trucks, combination trucks, Class I rail (distillate/diesel fuel), and water transportation (residual and distillate/diesel fuel oil). Marine gasoline use data were excluded because marine gasoline is used primarily in recreational vehicles. Commercial domestic aviation fuel consumption data were estimated from total commercial domestic aviation fuel consumption. General aviation data were excluded because passenger and freight data cannot be disaggregated. Pipeline data were excluded because ton-miles data include all types of petroleum products and energy consumption data were available for natural gas only.
SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, calculations based on data in table 14-8b.