Inspecting the Switch: An Amtrak Maintenance of Way employee inspects a switch just east of the platforms at the Trenton Transit Center on Tuesday, December 26, 2017. In the distance is A... (more)
Two DPU sets trail a loaded Union Pacific coal train down the 2-percent grade out of Tunnel 1 between Plain and Clay, Colorado, on a snowy December 22, 2006. The mid-train DPU made up of two EMD S... (more)