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The Rail Under Road Bridge and Signalbox is a location on the Main Line between Lower Tidmouth and Knapford.

It has appeared in the Railway Series book Gordon the Big Engine, the first series, stock footage in the second series and in the opening credits from the first to the eighteenth series.



  • The set has gone through several aesthetic changes in the television series:
    • Series 8:
      • The bridge changed colour from beige to red.
      • The design of the signal box changed.
    • Series 11:
      • The tracks became curved.
      • The signal box was removed.
    • Series 13:
      • The signal box returned.
      • The bridge became a deeper shade of red.
      • A house was added beside the tracks, though it frequently disappears and re-appears between episodes).
    • Series 17:
      • White fencing was added beside the road, though like the house, it frequently disappears and re-appears between episodes.
    • Series 20:
      • The bridge becomes much wider, with the road now accommodating two lanes.
    • Series 23:
      • A line was added on top of the bridge.
      • The signal box was once again removed.
  • The original bridge prop is owned by Twitter user TomsProps.
  • The remade bridge prop is now on display at Drayton Manor Theme Park.