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The National Transportation Safety Board on April 6 urged hazardous material regulators to step up requirements for replacing or retrofitting tank railcars that carry flammable liquids such as crude oil and ethanol with better thermal protection.

Diesel’s national average price fell 4 cents for a second straight week, to $2.784 a gallon, while gasoline took its biggest drop since January, the Department of Energy reported April 6.

Refiners are poised to make gasoline at a record pace this year, keeping the biggest U.S. crude glut in more than 80 years from overflowing storage.

LOUISVILLE, Ky. — The federal government has delayed the publication of a new greenhouse-gas emissions rule for trucks, a topic that was already top of mind for engineers, manufacturers and other industry leaders attending the Mid-America Trucking Show.

LOUISVILLE, Ky. — The head of North America’s largest heavy-duty truck maker said the U.S. government’s failure to sufficiently fund infrastructure is undermining efforts to improve fuel efficiency and reduce emissions.

LOUISVILLE, Ky. — Energy and the environment remain issues of great importance for trucking, in terms of the types of fuels consumed and the resulting laws and regulations, the CEO of Volvo Group said.

Diesel’s national average retail price fell for a third straight week, dropping 4 cents to a five-year-low $2.824 a gallon, the Department of Energy reported March 30.

The proposed Phase 2 greenhouse-gas emissions rule for medium- and heavy-duty vehicles has been forwarded to the White House Office of Management and Budget for review, Transportation Secretary Anthony Foxx said during an interview at a Politico “PlaybookLunch” event March 30.