High Quality Content by WIKIPEDIA articles! American Transportation Corporation (better known as AmTran) was a builder of school buses in the United States. Founded in 1980, the company traces its roots back to Ward Body Works, which was established in 1933. AmTran was acquired by Navistar International in 1994-1995, a move that would begin a series of alignment between school bus body manufacturers and chassis suppliers. In 2000, the company was rebranded as International Truck and Bus. (Some models were still labeled AmTran.) In 2002, the name was changed again to IC Corporation, and today is known as IC Bus.