Anacronismi: The fireside chat from President Franklin Roosevelt that can be heard playing on the radio is from 28 April 1935. The film is set in October 1933.
Audio/video fuori sincrono: There are several parts of the movie where you hear crossing gate bells. In one scene, the train is passing a field of wheat or dead grass. You hear the bells ringing, but there is no RR crossing, street, or crossing gate and bell to be seen.
Factual errors: The train highballs it out of the yard in the fog and gets sent into a siding. After backing out to resume on the main line, Shack throws the switch in the wrong direction (back into the siding).
Factual errors: The switch is not thrown for the mail express train to pass by Shack's train as it just enters the junction. In those days, not having the switch thrown would have derailed the mail train.