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Intermodal shipments grew 4.7% in the third quarter as companies stepped up imports ahead of promised U.S. tariffs on foreign goods and domestic shippers shifted from highway to rail in response to rising freight rates and constraints on truck capacity.

Look out, Amazon: Walmart is coming to steal your lunch — and maybe dinner too. The world’s largest retailer has surpassed the e-commerce giant in a survey of online food shoppers, more of whom said they most recently visited Walmart’s site for groceries.

Expeditors International of Washington Inc. achieved record profits and net revenue in the third quarter as the Seattle-based air and ocean freight forwarder benefited from lower taxes and kept ahead of rising transportation costs in a tight-capacity market.

Hub Group has agreed to acquire CaseStack Inc. for $255 million as part of a strategy to expand and diversify its transportation service offerings.

Amazon.com’s yearlong search for a second headquarters is nearing an end, people with knowledge of the matter said. One will be the Crystal City area of Arlington, in Northern Virginia, two people said. Another will be Long Island City, in the New York borough of Queens, other people said. An Amazon spokesman declined to comment.

The U.S. average retail price of diesel dropped 1.7 cents to $3.338 a gallon as prices for West Texas Intermediate crude oil continued to sink despite concerns that global supplies could fall amid U.S.-imposed sanctions on Iran. It was the third consecutive weekly decline in the price of diesel.

Truckload carrier Werner Enterprises has opened a shop in West Memphis, Ark., to replace its drop yard in Marion, Ark.