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Wal-Mart Stores Inc.’s vow to double sales of locally grown produce by 2015 should win favor with U.S. consumers but won’t have much effect on the world’s largest retailer’s supply chain, experts said.

HUNTSVILLE, Ala. — Navistar Inc. opened its new heavy-duty engine plant to journalists last week, showing where 114 employees are currently churning out 125 13-liter MaxxForce power plants a day.

The recent discovery of explosives in overseas packages is triggering a fresh look at cargo scrutiny measures that could involve truckers and airlines, government officials and experts said.

LEHIGH VALLEY, Pa. — Mack Trucks’ leadership rallied the company’s sales force here, urging dealers to sell more Pinnacle highway tractors in addition to the traditional vocational offerings. The formula for success, the leaders said, would be new ClearTech SCR engines, M-Drive transmissions and a “Made in the USA” appeal to economic patriotism.

Teamsters union employees at YRC Worldwide Inc. approved by a wide margin a third round of wage and pension concessions to buoy the less-than-truckload carrier’s financial future, by providing a $350 million annual cost reduction.

ABF Freight System launched a two-pronged offensive against Teamsters union labor concessions for YRC Worldwide, saying the breaks for YRC violate the terms of the National Master Freight Agreement and unfairly disadvantage ABF to the tune of $750 million.

The electoral wave that handed control of the House of Representatives to the Republicans also roiled the body’s transportation committee, ousting the panel’s current chairman and putting Rep. John Mica (R-Fla.) in position to lead the key committee.

The U.S. retail diesel average remained at $3.067 a gallon last week, leaving the price virtually unchanged for three weeks, the Department of Energy reported.

YRC Worldwide said Friday its third-quarter loss narrowed from a year ago, as tonnage improved sequentially from the second quarter.