Sources: U.S. Environmental Protection Agency; CP staff
Through its just-announced Cleaner Trucks Initiative (CTI), EPA aims to further decrease nitrogen oxide (NOx) emissions from on-highway heavy-duty trucks and update a current engine exhaust standard in an early-2020 rulemaking. Set in 2001, the standard culminated in 2010 with a 0.2-gram brake-horsepower-hour NOx threshold for which engine manufacturers deployed selective catalytic reduction equipment and urea-based diesel exhaust fluid.
Sources: Environmental Protection Agency; CP staff
EPA- and National Highway Traffic Safety Administration-proposed performance standards covering 2021–2027 model year heavy- and medium-duty trucks would achieve up to a 24 percent reduction of fuel consumption and carbon dioxide emissions when measured against a 2018 vehicle. The agencies address concrete mixers and dump trucks within a larger Vocational Vehicles category of heavy- and medium-duty models, representing what officials estimate is about 20 percent of fuel consumption in the transportation universe their proposal covers.
Responding to the White House’s second phase of fuel economy standards for heavy-duty trucks, targeted for 2015-16 rulemaking and implementation, Portland Cement Association CEO Gregory Scott noted, “We should expand the debate beyond making more efficient [vehicles] to making more efficient infrastructure.”