Caldicot station opened as a passenger halt on 12 September 1932. The road serving the station had been here for many years beforehand, since the building of the tunnel. It crosses the low tunnel line by an overbridge, then passes under the Gloucester line by an unusually low underpass. This underpass was originally provided to give farm access to the land of the Caldicot Levels south of the railway and it is a mark of the passenger station's minor importance that such a restricted access continues to this day.