![Two lane port tunnel](https://c1.vgtstatic.com/thumb/1/3/134381-v1/two-lane-port-tunnel.jpg)
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![Tyne Tunnel](https://c1.vgtstatic.com/thumb/1/3/134379-v1/tyne-tunnel-1.jpg)
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![Tyne Tunnel](https://c1.vgtstatic.com/thumb/1/3/134184-v1/tyne-tunnel.jpg)
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![Tømmerås Tunnel](https://c1.vgtstatic.com/thumb/1/3/134456-v1/t-mmer-s-tunnel.jpg)
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![Tømmerneset Tunnel](https://c1.vgtstatic.com/thumb/1/3/134460-v1/t-mmerneset-tunnel.jpg)
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![U.S. 191 rail underpass](https://c1.vgtstatic.com/thumb/1/0/102669-v1/u-s-191-rail-underpass.jpg)
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![Ulitsa Kanonerskiy Tunnel](https://c1.vgtstatic.com/thumb/1/3/134986-v1/ulitsa-kanonerskiy-tunnel.jpg)
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![Umskar Tunnel](https://c1.vgtstatic.com/thumb/1/3/134559-v1/umskar-tunnel.jpg)
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![Underground Access](https://c1.vgtstatic.com/thumb/8/7/87496-v1/underground-access-6.jpg)
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![Underground Access](https://c1.vgtstatic.com/thumb/5/3/53188-v1/underground-access.jpg)
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![Underground Access](https://c1.vgtstatic.com/thumb/8/9/89044-v1/underground-access-7.jpg)
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![Union Canal Tunnel](https://c1.vgtstatic.com/thumb/2/3/236139-v1/union-canal-tunnel.jpg)
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![UP - Horse Tunnel](https://c1.vgtstatic.com/thumb/2/2/225933-v1/up-horse-tunnel.jpg)
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![Upton Chamber](https://c1.vgtstatic.com/thumb/2/5/250743-v1/upton-chamber.jpg)
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![Uruti Tunnel](https://c1.vgtstatic.com/thumb/1/3/134242-v1/uruti-tunnel.jpg)
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![Vala Tunnel](https://c1.vgtstatic.com/thumb/1/3/134626-v1/vala-tunnel.jpg)
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![Valderøy Tunnel](https://c1.vgtstatic.com/thumb/1/3/134673-v1/valder-y-tunnel.jpg)
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![Vardø Tunnel](https://c1.vgtstatic.com/thumb/1/3/134185-v1/vard-tunnel.jpg)
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![Vestfjarðagöng](https://c1.vgtstatic.com/thumb/1/8/180285-v1/vestfjara-aga-ng.jpg)
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![Vethaugen Tunnel](https://c1.vgtstatic.com/thumb/1/3/134484-v1/vethaugen-tunnel.jpg)
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![Vielha Tunnel](https://c1.vgtstatic.com/thumb/1/3/134164-v1/vielha-tunnel.jpg)
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![Vielha Tunnel](https://c1.vgtstatic.com/thumb/1/3/134432-v1/vielha-tunnel-1.jpg)
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![Viggja Tunnel](https://c1.vgtstatic.com/thumb/1/3/134604-v1/viggja-tunnel.jpg)
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![Vik Tunnel](https://c1.vgtstatic.com/thumb/1/3/134646-v1/vik-tunnel.jpg)
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![Vika Tunnel](https://c1.vgtstatic.com/thumb/1/3/134586-v1/vika-tunnel.jpg)
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