Freightliner Corporation has agreed to acquire an ownership interest in TravelCenters of America, a network of full-service highway travel centers in the U.S.

Detroit Diesel Corp. announced fourth quarter 1998 revenues of $563 million and record fourth quarter earnings of $10.3 million.

Volvo announced the ratification of a six-year contract with the United Auto Workers Union for production and maintenance workers at its New River alley Truck Assembly Plant in Dublin, Va.

Ryder Integrated Logistics, Inc., an operating unit of Ryder System, has been awarded a $4.4 million contract to manage and operate the outbound distribution of products for Affiliated Food Stores, Inc.

Baker Electromotive, Inc. and Ford Motor Company will join forces to convert ten U.S. Postal Service vehicles into electric vehicles to be used for mail delivery.