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Speakers and exhibitors at the 2025 Advanced Clean Transportation Expo illustrated a growing interest in cleaner-burning and renewable fuels for the internal combustion engine.

Mack Trucks pulled back the curtain April 29 on plans to launch a battery-electric version of the Volvo Group division’s recently unveiled flagship on-highway Class 8 tractor, the Pioneer.

The innovation of alternative fuels is poised to move forward, said Cummins CEO Jennifer Rumsey, despite uncertainty around regulations, incentives and trade policies.

Hyundai Motor Co. unveiled the latest iteration of its Class 8 Xcient hydrogen fuel cell electric tractor April 28, overhauling the powertrain, safety systems and driver comforts.

Hydrogen trucks cost more than diesel models, but autonomous driving capabilities could double the utilization of those vehicles and improve the total cost of ownership calculation.

The new model is a battery-electric vehicle equipped with a gasoline-powered range extender that charges the battery when needed, enabling a range of up to 500 miles between charges.

The models were unveiled April 14 at a media preview at Texas Motor Speedway in advance of the trucks’ official debut April 28 at the Advanced Clean Transportation Expo.

Port of Stockton in California celebrated the debut of an expanded renewable fuels terminal that will facilitate the movement of biodiesel and renewable diesel from ships.

Volvo Trucks North America plans to launch a California Air Resources Board Omnibus rule-compliant diesel engine for its revamped longhaul and regional-haul tractors, the VNL and VNR.

Plug Power announced a $525 million secured debt facility, and said it completed construction of a hydrogen production plant in Louisiana.