Heading west, a Santa Fe freight led by SD45-2 5679, SD39 4017 and SD45 5554 reaches the summit of southern California's Cajon Pass on July 2, 1979.
SD45-2 5679 hustles a westbound freight past a recently "decapitated" signal bridge near Hesperia, which has been replaced by bi-directional CTC target signals on masts.