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
Trend of fuel efficiency at different speeds, grouped by vehicle age Last update January 2019
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Average Fuel Economy of Major Vehicle Categories
Comparison of fuel economy among vehicle types Last update December 2018
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Average Annual Fuel Use of Major Vehicle Categories
Comparison of fuel use (per vehicle) among vehicle types Last update December 2018
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Means of Transportation to Work
Trend of how people commuted to work from 1980-2016 Last update November 2018
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Monthly Fluctuation in U.S. Vehicle Miles Traveled
VMT for each month of the year, averaged over a five year period Last update February 2017
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Share of All Vehicle Trips by Trip Length
Average trip length and distribution by trip type in U.S., 2009 Last update September 2011
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Annual Vehicle Miles Traveled in the U.S.
Trend of Vehicle-Miles Traveled in the U.S. from 1970-2018 Last update September 2018
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Average Annual Vehicle Miles Traveled of Major Vehicle Categories
Comparison of miles traveled (per vehicle) among vehicle types Last update December 2018
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Miles of U.S. Transportation Infrastructure
Distance covered by different types of transportation infrastructure Last update July 2014
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Clean Cities Petroleum Saved by Idle Reduction
Trend of petroleum saved by idle reduction policies and technologies from 2004 to 2016 Last update November 2018
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Average Fuel Economy at Different Road Grades
Trend of Fuel Economy and Consumption at different road grades, for various vehicle types Last update August 2014
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Incentive Additions by Policy Type
Trend of state enactments listed by incentive type from 2002 to 2017 Last update March 2018
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Composition of New U.S. Light-Duty Vehicles by Vehicle Type Over Time
Shifting popularity of cars and trucks by year Last update July 2014
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Clean Cities Petroleum Saved by Fuel Economy and VMT Reduction
Trend of petroleum saved by fuel economy improvement and VMT reduction from 2004 to 2016 Last update November 2018
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Efficiency and Power of U.S. Light-Duty Vehicles Over Time
Trend of horsepower and fuel efficiency 1975-2014 Last update August 2015
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Fuel Taxes by Country
Comparison of gasoline and diesel taxes in Organization for Economic Co-operation and Development countries Last update September 2016
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Clean Cities Annual Energy Use Impact
Trend of reduced fuel use and increased fuel diversity from 1994 to 2016 Last update October 2018
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Clean Cities Cumulative Energy Use Impact
Trend of reduced fuel use and increased fuel diversity from 1994 to 2016 Last update October 2018
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Incentive and Law Additions by Fuel/Technology Type
Trend of state incentive and law enactments listed by the targeted technology or fuel type from 2002 to 2017 Last update March 2018
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Clean Cities Coalition Locations
Last update January 2019
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Light-Duty Vehicles Purchased in the U.S.
Trend in the number and types of light-duty vehicles being sold in the U.S. from 1975-2016 Last update October 2018
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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 #36, Table 4.28.
This chart shows how fuel economy varies with driving speed for three fuel types of midsize cars, 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 gently from 45 to 55 mph then drops quickly thereafter. The midsize hybrid electric vehicle loses efficiency more evenly between 45 and 75 mph than the other two vehicles.
To view more details, notes, and acronyms, please download the Excel spreadsheet.
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