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WASHINGTON — Federal investigators told Congress that the Department of Transportation’s drug- and alcohol-testing program for truck drivers is unreliable and riddled with problems.

Bill Davis Trucking, a truckload carrier based in Batesville, Ark., filed for protection from creditors under Chapter 11 of the U.S. Bankruptcy Act late last month.

Many carriers are still using those “How’s my driving?” decals featuring an 800 number the public can call to report a driver they consider unsafe.

WASHINGTON — The House Transportation and Infrastructure Committee last week approved a $2 billion plan to toughen bridge inspection standards and limit states’ ability to spend federal bridge funds on other projects.

Canadian transportation firm Mullen Group Income Fund’s third-quarter profit rose to C$38 million or 45 cents a share, from C$32.1 million or 45 cents a year earlier.

U.S. worker productivity rose at an annual rate of 4.9% in the third quarter, the most in four years, the Labor Department said Wednesday.

Transportation and logistics firm Pacer International said Wednesday that its president, Tom Shurstad, is leaving the company and that its retired chief executive officer, Don Orris, will become president of its intermodal segment.

Connecticut trucking companies are asking Gov. M. Jodi Rell (R) and state lawmakers to intervene in a dispute with the state’s Labor Department over how workers are defined for tax purposes, the Associated Press reported.

ORLANDO, Fla. — With idling restrictions increasing in states and localities around the country, carriers are increasingly interested in buying systems that will allow drivers to keep their truck cabs cool or heated and to operate electrical “hotel” appliances such as televisions or computers.