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Diesel’s national average retail price fell for the first time in a month, dipping 0.6 cent to $3.067 a gallon, the Department of Energy reported Monday.

PHOENIX — American Trucking Associations members approved a policy change that makes it easier for the federation to negotiate with regulators and legislators over carbon-emissions and climate-change measures, even if they could result in fuel price increases.

PHOENIX — The Pipeline and Hazardous Materials Safety Administration sent its new proposed “wetlines” regulation to the White House Office of Management and Budget on Oct. 15 for review.

The U.S. retail diesel and gasoline averages both rose again last week, the Department of Energy reported, but the increases slowed as crude oil prices continued a recent slide.

American Trucking Associations said Friday it has adopted a carbon-emissions control policy supporting a national fuel-economy standard for trucks, rather than government actions to increase fuel prices or alternative-fuel mandates.

A conference in Washington this week will reflect on the last 10 years of clean diesel technology and its effect on air quality, its organizers said.

A coalition of industry groups, including American Trucking Associations, touted its own voluntary efforts toward improving environmental sustainability as part of its push toward what it called “responsible” energy policies.

Fuel prices surged for a second week as the U.S. retail diesel average hit $3.066 a gallon, 6.6 cents higher than a week ago, the Department of Energy reported.