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LOUISVILLE, Ky. — The Federal Motor Carrier Safety Administration is “just about ready” to propose regulatory guidance that would urge medical examiners to require that some obese truck drivers be screened for obstructive sleep apnea before being allowed to drive, an agency official said.

Sales of all diesel retrofit devices in the United States declined in 2012 for the fourth consecutive year, according to the Manufacturers of Emission Controls Association.

The state of America’s infrastructure improved slightly to a “D+” grade from a “D” grade four years ago, while roads improved to “D” from “D-,” the American Society of Civil Engineers said.

President Obama has proposed giving those who buy trucks powered by natural gas a 50% tax credit on the price differential between natural gas and diesel-powered trucks.

Thomas Perez, currently head of the Civil Rights division of the U.S. Justice Department, is President Obama’s choice for labor secretary.

Idaho lawmakers Monday gave final approval of a bill that would allow 129,000-pound truck loads on 35 designated state highways.

A rule published Thursday by the Federal Motor Carrier Safety Administration expands the distance that drivers hauling agricultural products, livestock, machinery or supplies to or from farms can travel under the hours-of-service exemption for the agriculture industry.

Consumer confidence fell in March, according to the Thomson Reuters/University of Michigan consumer sentiment index released Friday.

The consumer price index rose for the first time in four months, the Labor Department said Friday.