Every new car and light truck sold in the U.S. is required to have a fuel economy window sticker label, listing the city and highway miles-per-gallon estimates that are designed to help consumers compare and shop for vehicles. The city and highway miles per gallon (MPG) estimates help consumers compare the fuel economy of different vehicles when shopping for new cars. Note that Section 774 of the Energy Policy Act of 2005 requires EPA to evaluate and/or adjust fuel economy test procedures to reflect real-world driving scenarios (higher speeds, faster acceleration, temperature variation, use of air conditioning, etc.). In August/September 2010, EPA and the U.S. Department of Transportation (DOT) proposed changes to the motor vehicle fuel economy label as called for by the Energy Independence and Security Act of 2007 (EISA), which specifically called for vehicles to be rated according to fuel economy, GHGs, and smog forming pollutants. In 2011, EPA and the NHTSA published the final rule. Starting with model year 2013, the redesigned and improved fuel economy labels will be required to be affixed to all new passenger cars and trucks - both conventional gasoline powered and “next generation" cars, such as plug-in hybrids and electric vehicles. Automakers may voluntarily adopt the new labels earlier for model year 2012 vehicles.