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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.

A truck replacement program designed to cut diesel emissions has been included as part of a legal settlement between the South Carolina State Ports Authority and an environmental group over expansion at the Port of Charleston.

The U.S. Environmental Protection Agency, noting “growing interest” in alternative-fuel conversion systems, recently proposed to streamline certification of aftermarket conversions that turn Class 8 diesel engines into engines that can burn diesel and natural gas.

The California Air Resources Board has awarded $200 million in Proposition 1B funds to help cut emissions from heavy-duty trucks and other sources in the state’s four busiest trade corridors.

A new study has found that nationwide adoption of a low-carbon fuel standard would increase the retail cost of motor fuel by as much as 170% over a 10-year period.

The National Highway Traffic Safety Administration plans to propose fuel efficiency standards starting with model year 2016 commercial medium- and heavy-duty on-highway vehicles, and said it will prepare and environmental impact statements as part of the procedure.

A new U.S. Department of Transportation study hints that the Obama administration’s recently announced plans to increase heavy truck fuel efficiency and to reduce greenhouse gas emissions likely will rely on a combination of existing aerodynamic design technologies and future diesel engine and drivetrain modifications that barely have left the laboratory or still are in development.

A new Department of Transportation study hints that the Obama administration’s ambitious plans to increase heavy truck fuel efficiency and reduce greenhouse gases emissions will likely rely on a combination of existing aerodynamic design technologies and future diesel engine modifications that have barely left the laboratory or are still under development.

Two U.S. senators last week unveiled a carbon emissions reduction bill observers said would significantly increase the cost of diesel fuel.