The first-ever heavy-truck fuel-efficiency proposal has been sent to the White House Office of Management and Budget for review.
Glen Kedzie, vice president and environmental affairs counsel for American Trucking Associations, said he believes the joint proposal from the Environmental Protection Agency and the National Highway Traffic Safety Administration has not undergone significant changes since it was first introduced in October.
That proposal would cut emissions from large trucks by 7% to 20% by 2017 depending on the size of a truck and the way it is used.
In October, the Environmental Protection Agency and the National Highway Traffic Safety Administration announced the first-ever standards to improve fuel efficiency of heavy-duty trucks and reduce greenhouse gas emissions.
Truck and engine makers have predicted they will be able to easily meet the 2014 standard, but that future reductions in carbon emissions will be challenging and costly.
President Obama, flanked by truck manufacturers and trucking industry executives at a White House Rose Garden ceremony in May 2010, signed an order paving the way for the new fuel-economy targets.
The final rule is expected to be released by July 30.
