Northward Louisville & Nashville Railroad intermodal freight train passing a road crossing on the W&A Subdivision at Smyrna, Georgia, on April 19, 1981. W&A stands for "Western & Atlantic," an L&N predecessor of Civil War fame from the "Great Locomotive Chase." Two signs protect the unsignaled crossing, a standard "crossbuck" at far right and a state-specific sign to its left, which reads, "Georgia Law Stop Unsafe R.R. Crossing." Different railroads and different states once displayed numerous different railroad crossing warnings, but most have since been standardized to the crossbuck, often accompanied by flashing lights and, sometimes, automatic gates.