U of M Report ; U.S. Drivers Using Less Fuel


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SEE ALSO: When Americans Use Non Exportable Renewable Domestic Fuel No Worry About How Much We Use.

U of M Contact Bernie DeGroat

ANN ARBOR April 1, 2014; Despite U.S. population growth, fuel consumption by American drivers of light-duty vehicles is now lower than it was 15 years ago, says a University of Michigan researcher.

In a follow-up to a series of reports released last year, Michael Sivak of the U-M Transportation Research Institute examined recent trends in fuel consumption by cars, pickup trucks, SUVs and vans in the U.S. fleet from 1984 to 2012.

His findings show that 123.6 billion gallons of gasoline were consumed in 2012—down 11 percent from a peak of 138.8 billion gallons in 2004 and less than the 125.9 billion gallons used in 1999.

"The decline of 11 percent since 2004 reflects the decline in distance driven and the improvement in vehicle fuel economy," said Sivak, a research professor at UMTRI and director of the Sustainable Worldwide Transportation research consortium.

In addition to total fuel consumption, Sivak examined fuel-consumption rates per person, per licensed driver, per household and per registered vehicle. He found that all four rates were 13-to-18 percent lower in 2012 than in their peak years (2003 for registered vehicles, 2004 for the other three measures).

Annual fuel-consumption rates for 2012 were about 394 gallons per person, 584 gallons per licensed driver, 1,021 gallons per household and 529 gallons per registered vehicle.

In addition to examining changes in fuel consumption, the latest study also analyzed changes in the number of vehicles and distance driven. The corresponding rates per person, per driver, and per household each reached their maximum around 2004. Given that the reductions in these rates began to occur several years prior to the onset of the economic downturn that started in 2008, Sivak believes that the maximum in the rates have a good chance to be long-term peaks.

Although economic factors have likely contributed to declining rates since the economic downturn, other societal changes have influenced the need for personal transportation, such as increased telecommuting, increased use of public transportation, increased urbanization of the population, and changes in the age composition of drivers, he said.

"The combined evidence from this and the previous studies indicates that—per person, per driver and per household—we now have fewer light-duty vehicles, we drive each of them less and we consume less fuel than in the past," Sivak said. "There is no evidence in the 2012 data that the peaks in the rates that we experienced about 10 years ago were temporary."

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