WASHINGTON, D.C. — Both Mack and Volvo have announced that all 2014 Class 8 vehicles are in compliance with new greenhouse-gas regulations, as certified by the Environmental Protection Agency (EPA) and National Highway Traffic Safety Administration (NHTSA).

According to the EPA, heavy-duty diesel trucks will be required to achieve up to about 15 percent reduction in fuel consumption and greenhouse gas emissions by model year 2018.

Under the first-ever greenhouse gas regulations for heavy trucks, EPA and NHTSA certifications apply to all configurations of Volvo VNL, VNM, VHD and Volvo Autohauler (VAH) models.

“Volvo is committed to leadership in fuel efficiency, and to reducing the carbon footprint of our operations and products,” said Göran Nyberg, president, Volvo Trucks North American Sales and Marketing.

“Certification of Mack’s entire vehicle portfolio reflects our continued commitment to fuel efficiency, environmental stewardship, and the country’s long-term energy security,” said John Walsh, Mack vice president of marketing.

In early 2011, the company introduced aerodynamic components for Volvo VN model highway trucks, such as exterior components included redesigned mirror heads with aerodynamic shrouds and arms.

New exterior components also included redesigned hood mirrors to increase visibility, as well as ground effect features below the bumper and side fairings.

Volvo said a more aerodynamic roof fairing and sun visor were also added to the VN model day cabs.