The Environmental Protection Agency and the Transportation Department are moving ahead with a proposal for medium- and heavy-duty trucks, beginning with those sold in the 2014 model year and into the 2018 model year.
Tractor-trailers, school buses, delivery vans and other large vehicles will need to be more fuel efficient under first-ever standards coming from the Obama administration. The plan is expected to seek about a 20 percent reduction in greenhouse gas emissions and fuel consumption from longhaul trucks, according to people familiar with the plan. They spoke on condition of anonymity because they did not want to speak publicly before the official announcement, expected Monday.
Overall, the proposal is expected to seek reductions of 10 percent to 20 percent in fuel consumption and emissions based on the vehicle’s size. Large tractor-trailers tend to be driven up to 150,000 miles a year, making them ripe for improved miles per gallon. The rules will cover big rig tractor-trailers, “vocational trucks” such as garbage trucks and transit and school buses, and work trucks such as heavy-duty versions of the Ford F-Series, Dodge Ram and Chevrolet Silverado.
Medium-duty and heavy-duty trucks are much less fuel-efficient than conventional automobiles; the fleet of tractor-trailers typically get about 6 mpg to 7 mpg, while work trucks can achieve 10 to 11 mpg. But they still consume about 20 percent of the transportation fuel in the U.S.