The California Air Resources Board has approved changes that give heavy-duty diesel engine manufacturers more time to comply with “technology forcing” regulations that require advances to engine onboard diagnostics systems that monitor nitrogen oxide emissions levels and particulate matter filter and sensor malfunctions.

Margo Oge, the high-level official for the U.S. Environmental Protection Agency who has spearheaded the agency’s efforts to reduce air pollution and greenhouse gas emissions from the U.S. transportation sector, is retiring from the agency where she worked for more than three decades.

ALEXANDRIA, Va. — The highway bill passed earlier this summer directs the Federal Motor Carrier Safety Administration to complete 29 new rulemakings over the next 27 months, including a requirement for a final electronic logging device rule by October of 2013, agency officials said Monday.

Motor carriers and shippers cited for hazardous materials violations face far greater penalties following the passage of the new federal highway reauthorization law.

Motor carriers who haul relatively small quantities of hazardous materials have cited concerns that a proposed newly-created hazardous materials safety measurement category would unfairly worsen their hazmat scores.

Federal regulatory “guidance” issued in June restricting the number of oil and gas drivers allowed to extend their workdays beyond the 14-hour limit could have significant adverse economic and safety implications for the trucking industry, several truckers said in comments filed earlier this month.

The Federal Motor Carrier Safety Administration ordered two affiliated Alabama trucking companies to stop operating, declaring the carriers “imminent hazards to public safety.”

Over the next five years, the Federal Motor Carrier Safety Administration plans to significantly reduce truck-related crash fatality rates by developing new credentialing and driver safety fitness standards, expanding its regulatory reach to include shippers and other industry players and creating new programs aimed at weeding out high-risk motor carriers.