America’s freight railroads operate the safest, most efficient, cost-effective and environmentally sound freight transportation system in the world — and the Association of American Railroads works every day to keep it that way. Founded in 1934, AAR is the world’s leading railroad policy, research, standard setting and technology organization that focuses on the safety and productivity of the U.S. freight rail industry. AAR full members include the seven Class I freight railroads in the United States, Canada and Mexico, as well as Amtrak. Affiliates and Associates include non-Class I and commuter railroads, rail supply companies, engineering firms, signal and communications firms and railcar owners.