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The Rail Under Road Bridge and Signalbox is a location on Thomas' Branch Line between the Post Windmill and Dryaw.

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



  • The set has had some modifications through the years:
    • In the thirteenth series, the bridge became a lot smaller, so small that there was only one road lane and trains only just fit under it. A second building on the opposite side to the signalbox appears and disappears between episodes.
    • In the seventeenth series, fencing was added on the road sides near the bridge but it would appear and disappear between episodes.
    • In the twentieth series, the bridge became slightly bigger and a lot wider, now allowing two vehicles to pass over it on two lanes.


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