ChatterBank1 min ago
Blackwell Tunnel
Why was the Blackwell Tunnel built with all those bends in the road? Couldn't they build straight under the Thames?
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For more on marking an answer as the "Best Answer", please visit our FAQ.As Postdog says it is to do with prevention of the horses bolting
http://news.bbc.co.uk/1/hi/world/europe/194558 1.stm
http://news.bbc.co.uk/1/hi/world/europe/194558 1.stm