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Are electric vehicles poised to break through in commercial transportation? Episode 3 of RoadSigns has the answer. Click to listen.

The U.S. average retail price of diesel inched down 0.6 cent to $3.217 a gallon while crude oil prices fell amid ongoing international currency and political issues that could sap demand.

Renewable energy company eNow announced that the National Highway Traffic Safety Administration certified its method of mounting solar power systems on truck rooftops as meeting federal safety standards.

A trailer makers group is asking a federal appeals court to require that two federal agencies state when they plan to make a final decision on a 2016 Obama-era heavy-truck greenhouse gas rule. Whether revised or kept in place, the rule would regulate trailers for the first time.

One of Oklahoma’s fastest-growing companies, Mammoth Energy Services, continued to expand in the second quarter, buying up two more companies and securing new contracts throughout the country.

Pilot Flying J is expanding its business portfolio with a move into the water, sand and crude oil-hauling business.

Hydrogen-electric truck maker Nikola Motor Co. announced it has quickly raised $100 million of a planned $200 million in C-round funding as it accelerates the scale of its operations.

The U.S. Environmental Protection Agency has launched a study of the potential economic impact forthcoming regulations that require shipping vessels to burn cleaner fuel might have on other transportation sectors, including trucking.

An ambitious plan to boost Mexico’s oil and gas production could slow the country’s energy sector reforms and hinder trade opportunities for U.S. refiners and pipeline companies that have ramped up exports to meet growing demand there, according to research firm Morningstar.

Last week, President Donald Trump proposed gutting California’s unique ability to write greenhouse gas emission limits for cars and trucks.