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ORLANDO, Fla. — An empty booth at the Technology & Maintenance Council’s 2009 Transportation Technology Exhibition marked the spot where auxiliary power manufacturer Rigmaster Power Corp. was to display its wares.

National Retail Systems has deployed 115 trucks to comply with the Clean Truck Program requirements set forth by the ports of Los Angeles and Long Beach, the company said Tuesday.

BorgWarner Turbo Systems said it is laying off 140 workers at its plant in Arden, N.C., that manufactures turbochargers for diesel trucks and construction equipment.

UPS Inc. and the U.S. Postal Service have agreed to work together to make it easier for consumers to return goods purchased online, a move that more closely aligns the nation’s mail delivery system with the largest commercial package carrier.

ARLINGTON, Va. — A top Navistar Inc. official said the company is pursuing its own solution to meet the 2010 U.S. emission standards, because it doesn’t believe the fuel savings claimed by competitors will justify the higher costs and more complicated systems associated with the new engines.

Descartes Systems Group said Thursday it acquired the logistics business of privately held Oceanwide Inc., in an all-cash transaction of about C$10.4 million ($8.4 million).

Starting in 2010, fleets buying new trucks will have to decide between two very different engine systems, and manufacturers already are warning that selecting the competing platform will leave the owner with an inferior product.

In a whirl of activity that is expected to accelerate in coming years, states are making toll roads a permanent part of the nation’s highway system and eyeing toll dollars as a way to plug gaping budget deficits.