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WASHINGTON — Researchers are joining major retailers, logistics firms, city transportation offices and others in the freight industry to reconsider last-mile delivery systems, even reviewing the way they get packages the “final 50 feet” in congested urban downtowns.

Shares of railroad and auto companies were among the biggest decliners after Canadian government officials said there’s an increasing chance that U.S. President Donald Trump will give six months notice to withdraw from the NAFTA trade agreement.

The chief executive of North America’s biggest auto supplier warned that overly complex NAFTA changes could result in a “lose-lose-lose” situation that leaves U.S., Mexican and Canadian manufacturers vulnerable.

FedEx has applied for a building permit for a building project valued at $35.4 million at its world hub at Memphis International Airport.

JD.com Inc. added so much warehouse space in three months that the new construction could cover just about every inch of Monaco, a pace of expansion that rivals growth at Amazon.com Inc.

Ford Motor Co. is expanding its driverless delivery experiment beyond pizza by partnering with Postmates to test what it will take to eventually remove the driver from on-demand distribution.

A coalition of the top three containerports, two private terminal operators and two industry analysts wrote a letter to President Donald Trump and Congress to urge lawmakers not to forget the ocean freight industry during the debate on infrastructure.

Western Express has paid more than $1.7 million for 12 acres in Plainfield, Conn., to expand its operations.

FedEx on Jan. 8 announced the official opening of a new, 1.4 million square foot Shanghai hub that bolsters access to one of the world’s fastest-growing markets.