The new "Eco-Drive Index" offers a mode of comparing the average monthly environmental impact by an individual U.S. driver who has purchased a new vehicle that month.
The standard caveats apply, such as the unpredictability of the type of fuel used, but this index could indicate if the fuel economy of new cars is improving or not. According to the study, emissions are indeed decreasing, with a 14% reduction of emissions per driver of newly purchased vehicles between October of 2007 and April of 2011.
The index was developed by Michael Sivak and Brandon Schoettle of the University of Michigan's Transportation Research Institute.
Itir Sonuparlak of The City Fix comments, "Although the market's current vehicles have better fuel-efficiency than that of previous vehicles, we are a long way from cutting our carbon emissions in a meaningful and effective way."
Thanks to Jeffrey Riecke
Read the full story: Calculating the Environmental Impact of Driving in the United States
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Rutgers University, Edward J. Bloustein School of Planning and Public Policy
One Hundred Miles
University of Michigan School for Environment and Sustainability (SEAS)
Hunter College, City University of New York (CUNY)
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