Have environmentalists prevailed in the debate over climate change? It certainly looks that way, says HDT Senior Editor Jack Roberts.

Jacobs Vehicle Systems announced a collaboration with the Center for Alternative Fuels, Engine, and Emissions at West Virginia University to further define...

Unlike passenger vehicles, which require biennial smog checks in California, heavy-duty diesel trucks are not currently required to undergo regular...

Pennsylvania is accepting grant applications to replace, repower, or retrofit fleet diesel-powered trucks, buses, and other vehicles and equipment.

Denso unveiled its new PowerEdge brand of starters, alternators, diesel particulate filters and diesel oxidation catalyst units for Class 8 trucks.

Sweden’s Volvo Group will set aside $780 million to cover estimated costs to address a faulty emissions control component used in diesel engines sold in...

The second generation of biofuels and renewable diesel is here, but what does that mean for Beverly Hills fleet manager Craig Crowder? For the City's fleet...

A new report by the Energy Transitions Commission shows that reaching net-zero carbon emissions from heavy industry and heavy-duty transport can be done...

Seemingly acting out of character, the Environmental Protection Agency on Nov. 13 announced it will launch a rulemaking to further cut the emission of...

FedEx Express improved fuel efficiency by 2.9% in fiscal year 2017 and has moved closer to meeting its corporate goal of a 50% increase by 2025 over 2005...