Maps and Data - Fuel Economy at Various Driving Speeds
Find maps and charts showing transportation data and trends related to alternative fuels and vehicles.
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118 results
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Regulated Fleets: State & Alt Fuel Providers
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Biodiesel Purchases by EPAct-Regulated Fleets
Trend of State and Alternative Fuel Provider Biodiesel Purchases from 2000 to 2021 Last update October 2022
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Clean Cities: Vehicles
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Clean Cities Alternative Fuel Vehicle Inventory
Alternative fuel vehicle inventory reported by Clean Cities coalitions from 2004 to 2021 Last update March 2023
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Clean Cities Energy Use Impact by Alternative Fuel Vehicle Type
Trend of energy impact by fuels used in alternative fuel vehicles from 2004 to 2021 Last update March 2023
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Fuels & Infrastructure: Idle Reduction
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Clean Cities Energy Use Impact through Idle Reduction
Trend of energy impact by idle reduction policies and technologies from 2004 to 2021 Last update March 2023
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Laws & Incentives
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Electric Vehicle Laws and Incentives by State
Displays states and their respective law and incentive counts related to electric vehicles
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Vehicles
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Electric Vehicle Registrations by State
U.S. light-duty electric vehicle population as of December 2021 Last update June 2022
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Regulated Fleets: State & Alt Fuel Providers
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EPAct State & Alternative Fuel Provider Fleet Exemptions
Trend of State & Alternative Fuel Provider (S&FP) exemption requests and vehicles exempted from 1997 to 2021 Last update October 2022
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Laws & Incentives
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Ethanol Laws and Incentives by State
Displays states and their respective law and incentive counts related to the use of ethanol
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Fuel Taxes by Country
Comparison of gasoline and diesel taxes in Organization for Economic Cooperation and Development countries Last update March 2019
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Fuels & Infrastructure: Emissions
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Greenhouse Gas Emissions by Economic Sector
Trend of U.S. greenhouse gas emission for each economic sector Last update July 2021
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Laws & Incentives
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Hydrogen Laws and Incentives by State
Displays states and their respective law and incentive counts related to the use of hydrogen
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Incentive Additions by Policy Type
Trend of state law and incentive enactments listed by incentive type from 2002 to 2022 Last update March 2023
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Law and Incentive Additions by Fuel/Technology Type
Trend of state law and incentive enactments, listed by the targeted technology or fuel type, from 2002 to 2022 Last update March 2023
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Natural Gas Laws and Incentives by State
Displays states and their respective law and incentive counts related to the use of natural gas
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Propane Laws and Incentives by State
Displays states and their respective law and incentive counts related to the use of propane
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Renewable Diesel Laws and Incentives by State
Displays states and their respective law and incentive counts related to the use of renewable diesel
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Vehicles
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TransAtlas
Interactive map displays light-duty vehicle registration counts over time by state and fuel type
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Regulated Fleets: State & Alt Fuel Providers
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Vehicle Credits Traded by Regulated Fleets
Trend of State & Alternative Fuel Provider (S&FP) EPAct credits traded and transactions from 1997 to 2021 Last update October 2022
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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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