I seen similar images of blurred trains online and wanted to try my hand myself but do something a little different.
I sourced an appropriate, hi-res image of a train at a station in London's Tube system. I duplicated the main layer then added a Path Blur on the top layer in Photoshop along the path of the train. I then masked out the blur on everything except the train, revealing the clear image parts below. The unique bit was to also mask out the blurred windows and make them clear. This was to bring attetion to moments in time in people's lives as they travel.