Metra MP36 423 leads an outbound commuter train during last light on the evening rush as it makes it's way out of downtown and through the suburbs. The train is passing by the empty CP Galewood Yard along the Elgin Sub.
Chicago's huge commuter rail system incorporates routes previously operated by Chicago & Northwestern, Milwaukee Road, Burlington, Illinois Centrak, Rock Island, Gulf Mobile & Ohio and Wabash (N&W).