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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.

Commodity companies are beginning to feel the impact of President Donald Trump’s trade policies, and their earnings report cards will signal how well they’ve been able to protect shareholder value.

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.

Natural gas has begun flowing again on a pipeline in British Columbia after a rupture on an adjacent line forced oil refineries in Washington to cut output and sent gasoline prices soaring up and down the West Coast.

Crude posted the biggest decline in eight weeks as a risk-off sentiment spread through global markets. Futures tumbled 3% in New York on Oct. 11. Investors eyed a sixth day of U.S. equity losses along with heightened volatility.

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.