Six major transportation companies merged their logistics units and launched Transplace.com, a Web-based marketplace they say will be a "one-stop" supermarket" for transportation services. The transportation companies forming Transplace.com: Covenant Transport Inc., Chattanooga, Tenn.; J.B. Hunt Transport Services, Lowell, Ark. M.S. Carriers, Inc., Memphis Swift Transportation Co., Phoenix U.S. Xpress enterprises Inc. Dallas Werner enterprises Inc. Omaha.
