Stephen Keppler, executive director of the Commercial Vehicle Safety Alliance, is leaving the commercial enforcement group after 15 years to become senior vice president of the Intermodal Association of North America.

In a letter to congressional transportation leaders, American Trucking Associations President Bill Graves said critical claims made by organized labor groups about the use of hair specimens for drug testing of commercial drivers are based on “false notions and outdated science.”

U.S. motorists drove a record 1.54 trillion miles in the first half of 2015, beating the previous high of 1.5 trillion set in June 2007, according to new estimates released by the Federal Highway Administration.

CRST Expedited Inc. has asked federal regulators to grant some of the company’s drivers an hours-of-service exemption that would allow them to use split sleeper berth time to satisfy federally required off-duty periods.

ST. LOUIS — Were it not for a twist of fate, Wal­-Mart Transportation truck driver Ronald Emenheiser would not have even been able to compete in the 2015 National Truck Driving Championships.

Electric and hydrogen cell-powered transport refrigeration units are the “most promising” technologies that can be used to reduce reefer emissions over the next five to 10 years and beyond, according to California environmental regulators.

Federal regulators have granted a two-year exemption for some hazardous material drivers to the hours-of-service rule on 30-minute breaks.

ST. LOUIS — Ronald Emenheiser Sr., a Wal-Mart Transportation professional truck driver based in Yorkana, Pennsylvania, took home 2015 Bendix Grand Champion honors at the  National Truck Driving Championships. See full list of winners, photos.

After two years of study, a federal drug advisory board has issued a recommendation that hair specimens be approved as an alternative for federal workplace drug-testing programs.