The International Association of Sheet Metal, Air, Rail, and Transportation Workers (SMART) is a North American labor union headquartered in Washington, D. C., was chartered by the AFL–CIO in 2013. The product of a merger between the Sheet Metal Workers’ International Association (SMWIA) and the United Transportation Union (UTU), SMART represents over 210,000 sheet metal workers, service technicians, bus operators, engineers, conductors, sign workers, welders, and production employees, among others, throughout the United States, Puerto Rico, and Canada. The Transportation Division (which has offices in Washington, D.C. and North Olmsted, Ohio) represents employees on Class I railroad, Amtrak, and regional and short line railroads; bus and mass transit employees on some 45 transit systems;