LOUISVILLE, Ky. — Health education specialist Kay Pfeiffer compares diabetic professional truck drivers who are not testing their blood sugar with “driving at night without headlights — and you’re going to crash.”

LOUISVILLE, Ky. — The federal mandate of electronic logging devices has been in effect since late last year, but some truckers still have lingering questions about the finer points of the regulation as tougher enforcement nears.

The decision by Uber to halt testing of its autonomous trucks in the wake of a fatal accident involving one of its pilot autonomous cars was a prudent move, and one that demonstrates how the relentless pace of technological innovation sometimes needs a pause.

LOUISVILLE, Ky. — For the second consecutive day, a meeting between truck drivers and federal regulators turned sour, with more than a dozen drivers yelling at regulatory officials attempting to have a peaceful presentation and question-and-answer session on hours of service and driver personal conveyance issues.