" Federal agencies (excluding the U.S. Postal Service) spend about $3 billion annually to acquire, operate, and maintain about 450,000 civilian and non-tactical military vehicles. Agencies may lease or buy vehicles from GSA, which also issues requirements and guidance on fleet management. In recent years, Congress and the President have raised concerns about the size and cost of federal agencies' fleets. In 2011, the President directed agencies to determine their optimal fleet inventories and set targets for achieving these inventories by 2015 with the goal of a more cost-effective fleet. GAO was asked to review agency efforts to reduce fleet costs. This report addresses (1) the extent to which selected federal agencies use leading practices to manage their fleets, including their sizes and costs, and (2) any challenges these agencies face in managing their fleets and strategies they use to address these challenges. GAO selected USDA, DHS, Interior, VA, Air Force, and the Army Corps for review based on factors such as fleet size, fleet composition, and changes in fleet size from 2005 to 2011. To identify leading practices, GAO interviewed recognized private sector and government fleet management experts and GSA officials. "