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Arvind Thiruvengadam (left) and Saroj Pradhan (right) check for leaks in the natural gas fuel system of a refuse truck.

Can heavy-duty diesel vehicles afford the switch to alternative fuels? WVU engineer to address critical knowledge gap

While personal vehicles that use electricity, propane or natural gas have gained popularity thanks to availability and affordability, heavy-duty vehicles like 18-wheelers and buses have been slow to change gears because of maintenance costs. But those vehicles, while only 5 percent of the traffic on the road, are responsible for 20 percent of transportation emissions.