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SCOTTSDALE, Ariz. — Ratification of the United States-Mexico-Canada Agreement, which is the proposed replacement for the North American Free Trade Agreement, is critical to uninterrupted, timely border crossings, trucking executives said here during American Trucking Associations’ Mid-Year Management Meeting.

As FedEx Corp. and UPS Inc. beef up automation to keep pace with surging e-commerce and a potential threat from Amazon.com, they’ve been stumped at a crucial stage: loading and unloading trucks.

UPS Inc. and an estimated 255,000 members of the International Brotherhood of Teamsters are now working under a new five-year agreement that brings labor stability to the Atlanta-based shipping giant. The contract took effect on April 29 after workers in Michigan ratified the last outstanding supplemental agreement.

Western Express, a Nashville-based freight company, announced May 1 it will spend $88 million and add 225 jobs as it adds new technology, business services and back-office support at its headquarters and expands its truck fleet nationwide.

Werner Enterprises Inc., a transportation and logistics company, said its total revenue for the first quarter ending March 31 increased 6% to $596.1 million versus the prior year quarter, primarily attributable to dedicated fleet expansion, higher contractual rates and lane-mix changes.

Celadon Group Inc. sold its North American container-on-flatcar intermodal operations to Bison Transport of Winnipeg, Manitoba, according to an April 26 press release.

Walmart Inc. could easily match Amazon.com’s one-day delivery gambit, according to an analyst who worked at the world’s largest retailer.

Forward Air Corp. reported record revenue and net income when the Greeneville, Tenn.-based carrier announced first-quarter earnings April 24.

The American Petroleum Institute’s latest heavy-duty engine oil standards, designated CK-4 and FA-4, have been on the market for more than two years, but only CK-4 lubricants have by and large replaced the previous CJ-4 formulation.

Remote diagnostics systems available on modern trucks are helping fleets avoid costly repairs and reduce vehicle downtime, and this technology is rapidly advancing toward offering better predictions of when problems might occur.