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UNDERGROUND RAILWAY TUNNEL * |
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| A tunnel carrying a railway beneath the surface of the ground. |
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EMERGENCY EXIT TUNNEL * |
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| A tunnel with strengthened construction, used as an emergency exit from a civil defence building. |
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RAILWAY TUNNEL PORTAL * |
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| An often stately or ornate entrance to a railway tunnel. |
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TRAMWAY TUNNEL PORTAL * |
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| The entrance to a tramway tunnel. |
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CANAL TUNNEL PORTAL * |
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| An often stately and ornate entrance to a canal tunnel. |
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ROAD TUNNEL PORTAL * |
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| The entrance to a road tunnel, sometimes of a grand construction. |
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CAVITATION TUNNEL * |
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| A tunnel used to test scale model propellers and hulls to consider the impact of caviation on wake, propulsion, vibration and noise. |
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PEDESTRIAN TUNNEL * |
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| A foot tunnel, often running beneath a road. |
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SUBAQUEOUS TUNNEL * |
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| A man-made passageway, which is built through a sea- or riverbed. |
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TRANSPORT TUNNEL * |
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| Sites and structures used for the transportation of goods and people under roads and rivers, or through hills, etc. |
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RAILWAY TUNNEL * |
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| A tunnel running under a river or a hillside through which a railway line runs. |
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TOWPATH TUNNEL * |
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| A canal tunnel built with one or more integral towpaths |
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TRAMWAY TUNNEL * |
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| A tunnel through which a tramway runs. |
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TUNNEL CHAMBER * |
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| A large space in an underground tunnel, usually wider than the tunnel itself, used for storage, etc. |
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ESCAPE TUNNEL * |
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| A tunnel built to allow internees (in a camp, prison etc.) to escape. |
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TUNNEL ARBOUR * |
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| An extended arbour, eg. the beech arbour at Hampton Court, Middlesex. |
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TUNNEL PORTAL * |
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| The entrance to a tunnel. Use more specific type where known. |
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CANAL TUNNEL * |
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| A tunnel with a canal running through it. |
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HORSE TUNNEL * |
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| A tunnel built alongside a canal tunnel to enable a horse to be unhitched and led through the hillside to meet the barge when it emerged from the tunnel. Mainly built prior to the development of the towpath tunnel. |
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WATER TUNNEL * |
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| A large, undergound watercourse. |
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ROAD TUNNEL * |
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| A tunnel running under a river or through a hill along which vehicles may travel. |
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TUNNEL KILN * |
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| A lime kiln in which coal is burnt, as distinct from a flame-free kiln in which wood or peat is used. |
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WIND TUNNEL * |
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| A structure used to test the aerodynamics of aircraft or vehicles. |
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TUNNEL * |
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| An underground channel with a vaulted roof. Use specific type where known. |
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