|An extremely rare "over/under" of the locomotive consist meet at the flyover at Frost (Victorville). This is the northern point where the tracks swap positions for the long journey through Cajon Pass. The train in the foreground is on the shorter track (more grade) down through the Pass, while the train going away from the camera already has climbed the mountain on the longer (less grade) track. The two tracks divide through the Cajon Summit area. 0803 hours.