Maps and Data
Find maps and charts showing transportation data and trends related to alternative fuels and vehicles.
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Fuel Economy at Various Driving Speeds
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Average Fuel Economy by Major Vehicle Category
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Average Monthly Fluctuation in U.S. Vehicle Miles Traveled
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Means of Transportation to Work
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Annual Vehicle Miles Traveled in the United States
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Share of All U.S. Vehicle Trips by Length (miles)
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Average Vehicle Trip Length by Purpose (2017)
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Average Annual Fuel Use by Vehicle Type
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Fuel Economy at Various Driving Speeds
45 | 55 | 65 | 75 | |
Midsize Conventional Gasoline Car | 43 | 45 | 38 | 32 |
Midsize Conventional Diesel Car | 57 | 55 | 45 | 37 |
Midsize Hybrid Electric Car | 55 | 46 | 38 | 33 |
Source: Oak Ridge National Laboratory, Transportation Energy Data Book #39, Table 4.33.
This chart shows how fuel economy varies with driving speed for midsize cars of three fuel types, as modeled by Argonne National Laboratory's Autonomie model. Midsize conventional gasoline cars achieve their best fuel economy at 55 mph. The fuel economy of midsize conventional diesel cars declines gradually from 45 to 55 mph and then drops quickly thereafter. The midsize hybrid electric vehicle loses efficiency more evenly between 45 and 75 mph.
To view more details, notes, and acronyms, please download the Excel spreadsheet.
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