The new standards are being proposed for three categories of heavy trucks: combination tractors, heavy-duty pickups and vans, as well as vocational vehicles. For combination tractors, the agencies are proposing engine and vehicle standards that begin in the 2014 model year and achieve up to a 20 percent reduction in carbon dioxide (CO2) emissions and fuel consumption by 2018 model year.
For heavy-duty pickup trucks and vans, the agencies are proposing separate gasoline and diesel truck standards, which start with the 2014 model year and achieve up to a 10 percent reduction for gasoline vehicles and 15 percent reduction for diesel vehicles by 2018 model year (12 and 17 percent respectively if accounting for air conditioning leakage).
Finally, for vocational vehicles, the agencies are proposing engine and vehicle standards starting in the 2014 model year which would achieve up to a 10 percent reduction in fuel consumption and CO2 emissions by 2018 model year.
There will be two types of metrics involved, namely for pick-ups and vans, the metric will be gram per mile (and gallon per 100-miles) based on payload, while for vocational vehicles and combination tractors, the standards are gram per ton-mile (and gallon per 1,000 ton-mile).
"These trucks represent only 4 percent of vehicles on the road, but they consume 20 percent of the fuel," said Don Anair, a senior analyst in UCS' Clean Vehicles Program. "These first-ever standards would provide truckers with clean, fuel-saving technology that would save them money at the pump. Meanwhile, all Americans would benefit from cleaner air and less dependence on oil."