The average fuel economy of new trucks, cars, sports utility vehicles and vans sold in the United States in January 2014 surged 0.1 mpg from December 2013, to 24.9 mpg, the University of Michigan Transportation Research Institute said in a according to a monthly report. The average fuel economy of new vehicles sold in the US rose 4.8 mpg since the researchers started obtaining data in October 2007.
Average sales-weighted fuel economy was calculated using monthly sales of individual models and the combined city-highway fuel economy ratings from the EPA Fuel Economy Guide for each model. On the other hand, the national Eco-Driving Index of University of Michigan Transportation Research Institute – which computes the monthly greenhouse gas emissions from a US driver who purchased a new vehicle during the month – dropped to a record-low 0.79 in November 2013.
The scores are compared with a base score of 1 in October 2007, when the researchers commenced collecting data. A lower index score is better. "This value indicates an improvement of 21 percent since October 2007," researcher Michael Sivak said in a statement. "The EDI takes into account both the fuel used per distance driven and the amount of driving."