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Blackwell Tunnel

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Madasever | 19:11 Fri 11th Apr 2008 | Motoring
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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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When those tunnels were built, there were no cars, just horse drawn carts, etc. By putting bends in, the horse couldn't see daylight, and so reduced the risk of a horse bolting to reach the other end.
Just as an aside, if you look at the foot tunnels built around the same time, these ARE straight.
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
You'ld get there quicker if the horses bolted!

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