Talk:Southwick Hill Tunnel

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Does anyone know why they close this once a month on Saturday night?

Why have they got tunnel closure signs on permanent posts or gantries. No other tunnel I know has such a regular closure and afterwards there is no visible sign of work having been carried out. (No cleaning, no road works, no new tarmac.)The signs themselves must have cost a fortune. If this was usual routine maintenance then why not have temporary signs. I have been told that the tunnel took an extraordinary length of time to build. Why would that be? The nearby Culfail tunnel doesn’t have anything like this amount of signs or closures.