In this image the photographer has probably used a low shutter speed around the region of 1/25 of a second. This is what gives the train the motion blur effect as it moves along the track at high speeds.
Lucas Esposito - This photograph is a good example of implied movement, which is part of the four elements of vision (color, form, depth, and movement.) The term refers to "the motion that viewers perceive in a still, single image without any movement of an object, image or eye." http://digital-photography-school.com/how-to-capture-motion-blur-in-photography