The National Highway Traffic Safety Administration (NHTSA) and Federal Motor Carrier Safety Administration (FMCSA) announced a proposal to equip heavy-duty vehicles with devices that limit their speeds on U.S. roadways, as well as requiring those devices be set to a maximum speed.

“There are significant safety benefits to this proposed rulemaking,” Foxx said. “In addition to saving lives, the projected fuel and emissions savings make this proposal a win for safety, energy conservation and our environment.”

The proposal would establish safety standards requiring all newly manufactured U.S. trucks, buses and multipurpose passenger vehicles with a gross vehicle weight rating more than 26,000 pounds to come equipped with speed limiting devices. The proposal discusses the benefits of setting the maximum speed at 60, 65, and 68 miles per hour, but the agencies will consider other speeds based on public input.

“Safe trucking moves our economy and safe bus operations transport our loved ones,” said FMCSA Administrator T.F. Scott Darling III. “This proposal will save lives while ensuring that our nation’s fleet of large commercial vehicles operates fuel efficiently.”

Motor carriers operating commercial vehicles in interstate commerce would be responsible for maintaining the speed limiting devices at or below the designated speed for the service life of the vehicle under the proposal. While the maximum set travel speed will be determined in the final rule, estimates included in the proposal demonstrate that limiting heavy vehicles will save lives.

Requiring speed limiting devices could also save an estimated $1.1 billion in fuel costs and millions of gallons of fuel annually, according to the agencies.

To read and provide comment on the proposal, click here.