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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.

Traffic congestion on the nation’s highways added $74.5 billion in operational costs to the trucking industry in 2016, according to the American Transportation Research Institute’s recent analysis.

On Nov. 6, voters may spoil BP’s welcome. That’s when it will be decided whether to limit drilling in an initiative that some say could cut the state’s oil output by more than half. The vote is being closely watched, not only by companies keen to join the Colorado boom but also by outsiders who see a potential blueprint for blocking development.

Diesel prices continue to move higher, increasing 0.9 cent to $3.394 per gallon, according to the survey by the U.S. Department of Energy on Oct. 15.

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.

WASHINGTON — The Trump administration is moving to allow year-round sales of gasoline with higher blends of ethanol, a boon for Iowa and other farm states that have pushed for greater sales of the corn-based fuel.

The U.S. average retail price of diesel jumped 7.2 cents to $3.385 a gallon as oil prices remained at levels not seen in four years over supply concerns. The increase was the seventh consecutive weekly rise for diesel, and the fuel has risen 17.8 cents a gallon since Aug. 20.

California is considering a formal, public counter-proposal to President Donald Trump’s proposed rollback of fuel and pollution requirements for cars and trucks.

TRAVERSE CITY, Mich. — Michigan Gov. Rick Snyder’s administration and Canadian pipeline giant Enbridge have agreed to replace twin 65-year-old crude oil pipes in a channel linking two of the Great Lakes with another that would run through a tunnel far below the lake bed.