Thread: Subways
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  #44  
Old 02-14-2018, 12:06 PM
Silent Hunter UK Silent Hunter UK is offline
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London does have some tunnels that could flood; there are special doors fitted near the Thames in case of emergency.

Also, there is a considerable difference between the oldest sub-surface lines (District, Circle, Hammersmith & City, Metropolitan) with main line size double-tracked tunnels and the deep level lines with smaller single bore tunnels.
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