Alternative fuels use in medium- and heavy-duty vehicles is accelerating in nearly all U.S. transportation sectors, according to a new report.

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The Sustainable Fleets Report issued Tuesday was completed by a consortium headed by consultants Gladstein, Neandross & Associates (GNA). 

The study looked at natural gas vehicles (NGV), propane, battery electric vehicles (BEV) and hydrogen fuel cell EVs in the medium- and heavy-duty fleets. The report was sponsored by Daimler Trucks North America, Penske Transportation Solutions, Shell Oil Co. and Exelon Corp. 

Researchers said diesel and gasoline would continue to dominate the commercial fleet market. However, about 98% of the fleet companies surveyed expect to increase or continue at the same level their use of sustainable...