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General Motors is in a race to be the first company to mass produce self-driving cars, but a recent crash with a San Francisco motorcyclist has illustrated the tricky challenge of assigning blame when an autonomous vehicle gets in an accident.

A glitch in the federal drug and alcohol clearinghouse final rule requires state licensing agencies to check the database for drivers who have flunked their drug tests, but fails to give state agencies the regulatory authority to take action by downgrading or declining to issue a commercial driver license to those drivers.

Michigan State Police motor carrier officers are teaming up with officers in neighboring states to raise awareness of human trafficking.

U.S. drivers are still cautious — but they’re getting used to the idea of self-driving cars.

For the third successive year, Atlanta’s five-level stack interchange known as “Spaghetti Junction,” where Interstates 285 and I-85 north intersect, is again the most congested freight bottleneck in the nation, according to new research conducted by the American Transportation Research Institute.

Maine Gov. Paul LePage took a step Jan. 17 toward regulating a rapidly emerging automotive technology that in the not-too-distant future could find self-driving cars, trucks and buses operating on Maine roads.

The U.S. National Transportation Safety Board is gathering information about an accident involving a Tesla Inc. Model S sedan that rear-ended a firetruck on a freeway near Los Angeles on Jan. 22, the agency said.

Waymo, the driverless car division owned by Google’s parent company, announced Jan. 22 that it will bring its test program to metro Atlanta.

Rhode Island received top marks on an advocacy group’s recent report card that evaluates states on their ability to enforce highway safety laws.

While it likely will be several more years before autonomous vehicles are common on North State roads, Interstate 5 could be a step closer to accommodating the vehicles by this spring.