Air quality issues at U.S. ports are gaining attention due to the impact that the growing foreign trade and cruise industries have had on expanding landside operations to service increased port traffic. The new line of Capacity propane-powered off-road trucks is targeted to meet the demand for alternate-fueled vehicles in port communities that are challenged to comply with stricter emissions rules.

CleanFUEL USA announced in 2011 a partnership with Capacity of Texas, Inc., to develop and certify the country's first terminal trucks utilizing its cleaner-burning, liquid propane injection (LPI) engine on a General Motors (GM) 8L platform.

Terminal trucks are used extensively in dock yards and large warehouse operations to move intermodal containers and freight trailers between ships, railroads, cruise ships, etc. The duty cycles of a typical terminal truck are relatively severe. The trucks are rarely non-operational and move multiple trailers of freight at one time. The large loads the vehicles are required to tow result in high fuel consumption; double that of a comparable on-highway vehicle. A key benefit for fleets considering a switch to propane is that CleanFUEL's 8L LPI engine (33,000-lb GVWR) offers the same horsepower, torque and performance as a gasoline-powered vehicle.

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