Southwick Hill Tunnel

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Coordinates: 50°51′17″N 0°14′19″W / 50.85472°N 0.23861°W / 50.85472; -0.23861

Western end of the tunnel, 2007

The Southwick Hill Tunnel is a 490-metre twin-bore road tunnel in Shoreham-by-Sea, West Sussex, England.

The tunnel was opened in early 1996 as part of the A27 Brighton bypass. The border between West Sussex and the unitary authority of Brighton and Hove is close to the eastern entrance of the tunnel. Non-motorised traffic (e.g. pedestrians, cyclists) and mopeds under 50 cc are prohibited from using the tunnel, with a warning sign indicating an alternative route.

The tunnel takes the A27 under Southwick Hill as an extension of the Brighton and Hove bypass and part of the strategic south coast route. The tunnel was built through the chalk of Southwick Hill using the New Austrian Tunnelling method.[1]

Nearby towns include Shoreham-by-Sea and Portslade.

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