American businesses that operate heavy on-road vehicles will save an estimated $50 billion in fuel costs under fuel-efficiency and greenhouse gas emissions standards announced by NHTSA (National Highway Traffic Safety Administration) and the U.S. EPA. The standards, which apply to model years 2014 through 2018, are expected to reduce fuel consumption by 530 million barrels and GHG emissions by 270 million metric tons. There are separate standards for three main types of vehicles and for subcategories of each type. Semi-trucks will be required to achieve an average 20% reduction in fuel consumption and greenhouse gas emissions by model year 2018; heavy-duty pickup trucks and vans will be required to achieve an average 15% reduction; vocational vehicles (including delivery trucks, buses, and garbage trucks) will be required to reduce fuel consumption and greenhouse gas emissions an average 10%. The percentage reductions for the three types of vehicles use a 2010 baseline, and compliance for heavy-duty pickup trucks and vans is voluntary in MY2015 and 2016.