Ben
fotopic... whats that?
Posts: 4,282 
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Post by Ben on Feb 13, 2009 14:10:08 GMT
I have no knowledge other than from this forum (including this thread) and common sense The latter doesnt always apply for lul though  Seriously, the answers have already been given in this very thread, honnest! On a semi related note, at wembley, after the southbound Met platforms the fast and slow join. Surely under the resignalling the fast could be extended slightly to join onto on of the parallel tracks for the depot; maybe this could help with possible overruns and station entries for trains? |
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Post by citysig on Feb 13, 2009 19:16:57 GMT
On a semi related note, at wembley, after the southbound Met platforms the fast and slow join. Surely under the resignalling the fast could be extended slightly to join onto on of the parallel tracks for the depot; maybe this could help with possible overruns and station entries for trains? It was, sort of, a few years ago. The direct link from Platform 6 to the depot reception road was re-instated. This meant that the southbound fast depot-bound trains did not now need to merge with the local before diverging off to depot. However, due to certain constraints put into the planning, a full speed overlap was not provided, and so speed control signalling is still in effect over the whole area. Many of us agree a very great opportunity was missed. |
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Chris M
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Post by Chris M on Feb 13, 2009 23:27:15 GMT
How big a job would it be to upgrade the layout to include a full speed overlap?
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Post by citysig on Feb 14, 2009 2:46:52 GMT
The layout as it is now will remain - this is the layout that was accepted by HMRI and the like, and it provides trap points to protect the main from the depot and vice versa.
The main problem with platform 6 is that the overlap stretches over the current through route to the point where the fast and local merge. No overlap can be granted towards the depot - it was deemed unacceptable to have the risk of a train having a full-speed SPAD at the starter and ending up somewhere in the depot or off the track via the trap points!
The only other development that was due to be taking place (now well over a year behind schedule) was to add additional speed control signalling on the approach to platform 6.
This would then allow any train to approach Wembley on either road, and reach the platform even if there was a train on the opposite road routed through the station.
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