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| Buriton Tunnel speed limit and Pompey line signal coverage 15/07/2015 at 16:24 #74253 | |
Underwood
748 posts |
Hello all, A couple of things: 1. Does anyone know why the limit through Buriton Tunnel is 40mph, even for 450's, 444's etc? Is there a gauging issue maybe? 2. Who covers the Portsmouth Direct line nowadays? Is Petersfield, Havant, Haslemere etc still open or do I recall the line being taken over by Fratton or something? If so what is the boundary to Guildford? Any help appreciated 
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| Buriton Tunnel speed limit and Pompey line signal coverage 15/07/2015 at 21:53 #74265 | |
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Muzer
718 posts |
" said:Hello all,Yeah, the kinematic envelope for 23m vehicles is too wide at higher speeds, so if two pass each other in the tunnel they could potentially collide when going at high speeds. There actually used to be a differential speed restriction allowing "normal" (shorter vehicled) trains to go at a higher speed but restricting (23m) 442s to 40mph. Unfortunately but understandably, when the Slamdoor stock and later 442s were replaced with Desiros, it was decided that the potential for confusion between 450s and 444s was too great (since they have exactly the same cab), so despite 450s having shorter vehicles they still have to use the lower speed restriction. Quote: 2. Who covers the Portsmouth Direct line nowadays? Is Petersfield, Havant, Haslemere etc still open or do I recall the line being taken over by Fratton or something? If so what is the boundary to Guildford?I believe the boxes are still open. I don't believe there's a signalbox at Fratton (except possibly something for the yard), you might be thinking of Havant — but I don't think it's taken over the Portsmouth Direct. I might be wrong about this, though, I lose track! Log in to reply |
| Buriton Tunnel speed limit and Pompey line signal coverage 16/07/2015 at 00:00 #74271 | |
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rodney30
165 posts 
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Havant signal box (or what ever it is called) controls Portsmouth harbour to south of Petersfield. then the boxes are the same e.g. haslemare then farncombe (I think) then Guildford then Woking and Wimbledon.
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| Buriton Tunnel speed limit and Pompey line signal coverage 16/07/2015 at 07:55 #74273 | |
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Cedric
46 posts |
Correct. Havant, Petersfield, Haslemere, Farncombe, Guildford, Woking, Wimbledon ASC
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