![Héðinsfjarðargöng - Siglufjörður entrance](https://c1.vgtstatic.com/thumb/1/8/180283-v1/ha-a-insfjara-arga-ng-siglufja-ra-ur-entrance.jpg)
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![Hida tunnel](https://c1.vgtstatic.com/thumb/1/3/134761-v1/hida-tunnel.jpg)
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![Highway and tunnel construction](https://c1.vgtstatic.com/thumb/1/0/10752-v1/highway-and-tunnel-construction.jpg)
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![Highway tunnel](https://c1.vgtstatic.com/thumb/5/0/50377-v1/highway-tunnel.jpg)
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![Highway tunnel in Switzerland](https://c1.vgtstatic.com/thumb/3/1/3183-v1/highway-tunnel-in-switzerland.jpg)
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![Highway tunnels through a high-rise](https://c1.vgtstatic.com/thumb/8/1/81839-v1/highway-tunnels-through-a-high-rise-1.jpg)
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![Hitra Tunnel](https://c1.vgtstatic.com/thumb/1/3/134425-v1/hitra-tunnel-2.jpg)
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![Hitra Tunnel](https://c1.vgtstatic.com/thumb/1/0/107882-v1/hitra-tunnel-1.jpg)
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![Hjartås Tunnel](https://c1.vgtstatic.com/thumb/1/3/134569-v1/hjart-s-tunnel.jpg)
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![Hjelvik Tunnel](https://c1.vgtstatic.com/thumb/1/3/134660-v1/hjelvik-tunnel.jpg)
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![Hofstad Tunnel](https://c1.vgtstatic.com/thumb/1/3/134613-v1/hofstad-tunnel.jpg)
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![Holand Tunnel](https://c1.vgtstatic.com/thumb/1/3/134567-v1/holand-tunnel.jpg)
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![Holland Tunnel](https://c1.vgtstatic.com/thumb/1/3/134205-v1/holland-tunnel.jpg)
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![Holland Tunnel - NJ side](https://c2.vgtstatic.com/thumbll/8/0/8035-v2/holland-tunnel-nj-side.jpg)
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![Holland Tunnel Entrance](https://c1.vgtstatic.com/thumb/1/1/110234-v1/holland-tunnel-entrance.jpg)
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![Homer Tunnel](https://c1.vgtstatic.com/thumb/1/4/144654-v1/homer-tunnel.jpg)
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![Honningsvåg Tunnel](https://c1.vgtstatic.com/thumb/2/6/269645-v1/honningsva-g-tunnel.jpg)
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![Honningsvåg Tunnel](https://c1.vgtstatic.com/thumb/1/0/107836-v1/honningsv-g-tunnel.jpg)
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![Hoosac Tunnel, Central Shaft Ventilator](https://c2.vgtstatic.com/thumbll/4/0/40365-v2/hoosac-tunnel-central-shaft-ventilator.jpg)
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![Hoosac Tunnel, East Portal](https://c2.vgtstatic.com/thumbll/1/0/100680-v1/hoosac-tunnel-east-portal.jpg)
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![Hoosac Tunnel, West Portal](https://c2.vgtstatic.com/thumbll/4/0/40342-v1/hoosac-tunnel-west-portal.jpg)
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![Hopla Tunnel](https://c1.vgtstatic.com/thumb/1/3/134597-v1/hopla-tunnel.jpg)
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![Hospital Rock Tunnels](https://c1.vgtstatic.com/thumb/1/3/134254-v1/hospital-rock-tunnels.jpg)
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![Houma Tunnel](https://c1.vgtstatic.com/thumb/1/3/134531-v1/houma-tunnel.jpg)
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![Hsuehshan Tunnel](https://c1.vgtstatic.com/thumb/1/3/134158-v1/hsuehshan-tunnel.jpg)
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