By the end of the 1920s, the federal highway system replaced the names of early routes with standardized numbers, and in Pennsylvania and other states the Lincoln Highway became U.S. Route 30. At the same time, the Lincoln Highway Association concluded that its goals had been achieved and prepared to dissolve. Before disbanding, it arranged for permanent markers to be placed along the route so motorists would remember the road’s symbolism. On September 1, 1928, Boy Scouts across the nation installed more than 3,000 concrete mile markers, each with a bronze profile of President Abraham Lincoln, a directional arrow, and the Lincoln Highway logo. Although weather, careless drivers, and road-widening projects have damaged many of them, some markers still remain visible along the Lincoln Highway corridor in Pennsylvania.