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A misconduct investigation completed by Tennessee Technological University concluded that university researchers erred when stating in an industry-funded glider kit study that emissions from the trucks are as clean or cleaner than those from newer trucks.

INDIANAPOLIS — Sales of Class 8 natural gas fueled trucks are rising, grants and incentives for using alternative fuels are expanding and more related regulations are coming as major shippers pursue environmental sustainability, experts said at an industry forum here.

Four House Democrats have asked the Environmental Protection Agency Inspector General to investigate a glider truck study by a Tennessee Tech University researcher. The study already is the subject of a research misconduct investigation by the university.

Elon Musk will give up the role of Tesla Inc. chairman and pay a $20 million penalty to settle fraud charges brought by the U.S. over his claims about taking the company private.

Volvo Trucks announced it would commercialize all-electric trucks in North America in 2020 after introducing them in California next year, a move made in conjunction with a partnership that includes Volvo Group, California’s South Coast Air Quality Management District and industry leaders in transportation and electrical charging infrastructure.

U.S. consumer spending edged up a moderate 0.3% in August, the smallest gain in six months, as sales of cars and other durable goods fell.

Carrier Transicold Europe showcased several new products at the IAA Commercial Vehicles Show in Hanover, Germany, as well as its sustainable transport solutions.

Allison Transmission announced it will offer its new medium-duty, fully automatic 9-speed transmission globally and that it also developed an electric hybrid system with an extended range up to 9 miles.

Independent engine maker Cummins Inc. introduced innovations for the diesel engine intended to achieve a low nitrogen oxide-emissions future, a reduction in the carbon footprint and improve fuel mileage. It also presented a hybrid-electric powertrain.