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PITTSBURGH — For the first time in 20 years, a driver has won top honors at the National Truck Driving Championships two years in a row.

Don Daseke, chairman and CEO of Daseke Inc., will retire from the company effective immediately.

The Federal Motor Carrier Safety Administration on Aug. 14 issued a long-awaited proposal to make changes to its hours-of-service rules that would increase truck drivers’ flexibility with their 30-minute rest break and with allocating time in a sleeper berth.

FedEx Corp. is ending its ground-service delivery contract with Amazon.com, a sign the delivery giant is pulling away from the largest U.S. e-commerce company and focusing on other clients in the market, such as Walmart and Walgreens.