Sales of diesel particulate filters for trucks and buses in California increased at the end of 2013 and in the first half of this year compared with the first half of 2013, according to a survey released Aug. 5 by the Manufacturers of Emission Controls Association.

State law enforcement disparities create uneven safety playing fields for carriers that have different operating patterns and mileage exposure, according to an American Transportation Research Institute study released July 31.

A federal appeals court ruled on July 9 that federal law does not exempt motor carriers from a California law requiring that they provide truck drivers no less than a 30-minute paid meal break when their work period is more than five hours.

For the second time in five months, the U.S. Supreme Court has declined to hear an appeal by the Owner-Operator Independent Drivers Association challenging the legality of a federal cross-border pilot program allowing some Mexican trucks to operate in the United States.

Federal Highway Administration inspectors have confirmed earlier suspicions that a 50,000-ton pile of fill dirt placed adjacent to the I-495 Christina River Bridge site in Wilmington, Delaware, caused a buckling of four of the bridge’s 37 piers that led to its closing earlier this month.