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| Re: Fourth Rails and Safety (832238) | |||
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Re: Fourth Rails and Safety |
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Posted by Wado MP73 on Fri Sep 11 21:35:53 2009, in response to Fourth Rails and Safety, posted by Subterranean Railway on Fri Sep 11 11:05:08 2009. While I don't have any statistics, one of my London Underground books says it's more dangerous than three rail in case a person falls on the tracks.It was actually an American (Yerkes) who decided to use four rail electrification on the later tube lines and eventually that system was adopted on sub-surface lines and earlier tube lines (except the Waterloo & City which wasn't part of LU) as well. The Waterloo and City got four railed much later in the nineties when the ownership was transferred and rolling stock common with the Central line started to be used. The Northern City line was once converted to LU style four rail but was converted to Southern type three rail when it was transferred to the BR in the mid-seventies. |
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