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| Flooding in the South West 27/11/2012 at 23:21 #38219 | |
Ben86
126 posts |
" said:For interest the SLW is on the down,not the up (the up main being blocked) ,so a double reversal is required .How short-sighted of the developers not to create such a scenario!  In all seriousness, sounds like a recipe for severe delays- presumably working wrong road also means a very restrictive speed limit? Log in to reply |
| Flooding in the South West 28/11/2012 at 00:14 #38220 | |
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Stephen Fulcher
2078 posts 
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I believe it to be 50mph for single line working wrong road, and 5mph over any facing points. I would imagine when Exeter PSB was being designed in the 1980s the need to run bidirectionally on the Down Main was not a contingency that was considered likely to be required. To do so would require an extra four ends of points, numerous signals and a few things that most people would not initially think of - like five AWS suppressors. When I used to maintain the signalling on the northern section of the Chiltern Main Line, the main annoyance for us was having to test all of the bidirectional controls, which were only used by one train in the evening purely for route-retention purposes. I do not recall a single instance in my nine years in the area where bidirectional running happened for more than one or two trains, and I can think of at least one occasion when it was booked out of use for a while without anyone being particularly bothered. Log in to reply The following user said thank you: Ben86 |
| Flooding in the South West 28/11/2012 at 02:27 #38223 | |
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Colourlight
117 posts |
Mr Fulcher is indeed correct when he says the max speed for a train travelling in the wrong direction over a single line worked by Pilotman is 50 mph. And by a strange co-incidence Thats what I,m doing right now Between March and Whittlesea due to Engineering Work.
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| Flooding in the South West 28/11/2012 at 02:34 #38225 | |
GeoffM
6376 posts |
" said:Mr Fulcher is indeed correct when he says the max speed for a train travelling in the wrong direction over a single line worked by Pilotman is 50 mph. And by a strange co-incidence Thats what I,m doing right now Between March and Whittlesea due to Engineering Work.I hope not literally right now! Bi-di often seems to be the first casualty of any shortages or problems, or at the bottom of any maintenance list. The Southern used to - or maybe still do - had to stop a driver at the entrance to any wrong-direction bi-di section to tell him that he was going wrong road. In other words, telling him verbally what the signal was about to tell him with a route indication anyway. Little wonder it was rarely used. SimSig Boss Log in to reply |
| Flooding in the South West 28/11/2012 at 09:25 #38228 | |
KymriskaDraken
963 posts |
" said:In my Bristol Panel days we almost never used the CANBIDS between Bristol and Box. The "signalling" in the wrong direction was completely inadequate - one signal between Bristol and Bath if I recall correctly. There was proper bi-directional signalling on the Badminton line, from Sodding Chipbury up, but that was almost never used either. Log in to reply |