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A U.S. Appeals Court rejected a bid by three California community groups to overturn a lower court ruling that emissions from trucks and locomotives in BNSF Railway and Union Pacific facilities did not violate a federal waste disposal law.

The California Air Quality Resources Board voted April 25 to extend the deadline for independent truckers and small fleets to comply with new state emissions rules.

California regulators are considering relaxing strict rules for smaller trucking fleets to clean up older diesel-powered trucks that are among the state’s worst remaining sources of air pollution, the Los Angeles Times reported.

A group of more than 20 environmental, health and trucking industry stakeholders have asked House committees to continue funding a popular diesel emissions reduction grant program omitted from the Obama administration’s 2015 fiscal year budget.

Emissions of nitrogen dioxide and particulate matter from heavy-duty engines produced since 2010 are “substantially lower than required by regulations,” according to a new study.

Federal regulators withdrew some portions of a rule they tried to finalize in June that would have made minor technical amendments to the upcoming greenhouse-gas emissions and fuel-efficiency standards for heavy trucks.

WASHINGTON — Work will begin immediately to develop a second round of fuel-performance standards for heavy trucks starting in model year 2019, an Environmental Protection Agency official said Wednesday.

ESW CleanTech has acquired the assets and product line of Cleaire Advanced Emissions Controls.