A westbound ballast train pulls out of the Cheyenne Yard, ready to head west on the Laramie Sub. The train is on Main 4, crossing underneath the BNSF Front Range Sub. The train is on Main 4 because it will actually swing south and go through Speer Junction before heading west on Main 3 to Dale Jct. Main 3 is on a totally separate grade from Mains 1 and 2 between Cheyenne and Dale Jct (near Hermosa Tunnel). Main 3 is longer, but the grade is much lower, so heavy westbounds, such as this ballast train, frequently take Main 3.
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