Tri-State Motor Transit specializes in transporting cargo that requires careful handling.Tri-State Motor Transit Co. is the Secured Materials segment of the company and one of the largest nationwide carriers of hazardous materials for the Department of Defense and the Department of Energy. TSMT holds authorities to transport all classes of explosive materials, nuclear fuel cycle, and radioactive materials, as well as all other toxic and hazardous materials allowed for highway movement throughout the United States and provinces of Canada.