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Ryder System Inc. awarded a four-year fueling contract to Clean Energy Fuels Corp. to supply Ryder’s fleet of liquefied natural gas heavy-duty trucks serving Toyota Motor Manufacturing’s plant in Georgetown, Ky., Toyota’s largest production facility in North America.

Video: Cummins' Tim Proctor, left, talks with TT's Roger Gilroy about meeting the fuel economy needs of customers who are concerned about global warming.

Frito-Lay Senior Director of Supply Chain Mike O'Connell, right, discusses PepsiCo's "Performance With Purpose" strategy to reduce the greenhouse gas impact of its fleet with TT's Roger Gilroy.

North American Council for Freight Efficiency Executive Director Mike Roeth (right) discusses diesel efficiencies demonstrated during the Run on Less event, and where diesel fits into the future of trucking as a power source, with TT Executive Editor Joe Howard.

"Natural gas is ready right now, it’s available, and it should be part of that overall equation when any fleet operator or transit company looks to deliver goods," says Dan Gage (right), president of Natural Gas Vehicles for America, talking with TT's Joe Howard. More at bit.ly/TT-LOW1117. (Joseph Terry/Transport Topics)

Volvo Trucks introduced two gas-powered, heavy-duty trucks that offer fuel efficiency and performance on par with that of diesel-fueled trucks, and comply with Euro 6 emissions regulations.

The idea was nothing short of revolutionary: Convert the nation’s millions of trucks, buses and other commercial vehicles to run on natural gas instead of gasoline and diesel.

The tightening of emissions limits for deep-water ships has some of North America’s busiest ports chasing a new opportunity.

Vehicle tailpipe and crankcase emissions are the highest sources of methane emissions from heavy-duty natural gas-fueled vehicles and the fueling stations that serve them, according to a study by West Virginia University scientists.