Parsons Green and the S7s

31 Road - That is much like 29 Road, in that it is behind the platform, and I think that a picture may help:



That image (from the original DD site) shows the view from 23 Road, with 31 road being that set of buffers behind the EB. To quote DD: 
so that's that one answered

As for 28 Road, I think that it can accept S7 stock, and it has certainly been fitted with the new style buffers, I doubt it would have received these if an S7 didn't fit! likewise the rest of the roads can accept S7s, but in some cases this has meant limiting the number of trains, and moving stopping positions.
I highly doubt any new roads will get built, there really isn't the space, but with some clever remodeling, you might be able to stable 1 additional train. This is entirely guessstimation work, but you could move the stopping positions for 21 and 22 road back to the very end of the track, and then by remodeling the pointwork, you might end up with enough space to fit an S7 in 29 road.

As for all the moves, you'll just have to wait for someone else to pop along!


EDIT: Looks like I've saved Colin some work (hopefully - I don't think there are any mistakes?)

Firstly here is a plan of Parsons Green so that we all know what we're talking about:



I'll mention C stock so that you can understand how the site is affected now its withdrawn.

21 to 24 roads (plus 29 & 31 roads)

To the west of the station we have 21 to 24 roads - these can be accessed from the Westbound platform via shunt signal WF9 (hence 4 routes) and each can take one C, D or S stock.

We can also access these roads from the Eastbound platform, but its not quite so straight forward. To access 21 or 22 roads, we firstly need to pull right up to the station starter (WF38) on a C stock or if in a D or S stock pass the station starter showing a Green aspect and pull up to the respective stopping mark. We then change ends and use shunt signal WF4 which is part way down the platform. You'll note this signal has three routes - we'll cover the third route later.

To access 23 or 24 roads, we simply berth in the platform as normal, change ends and use shunt signal WF6.

Using the respective shunt signals, we can access either platform from these roads, though because of where the points are located, we don't enter service if coming into the Eastbound platform from 21 or 22 roads (last car not in platform).

you'll note that 21 and 24 road's shunt signals (WF29 & WF33) have three routes; the third route gives access to 29 and 31 roads respectively. 29 road is only long enough to accommodate C stock and is thus no longer used. 31 road, as already mentioned, is far too short to be of any use at all.

25 and 27 Road (or 27 top & bottom)

Officially known as 25 and 27 road but more commonly referred to as 27 top & bottom, this is the long siding east of the station adjacent to the Eastbound track.

As the naming suggests, it can accommodate 2 trains of C, D or S stock and is accessed from the Eastbound platform via shunt signal WF34. Shunt signal WF35 must also be clear no matter whether a train stables top or bottom and so drivers will take a train all the way to the bottom if no train is already present - conversely if a train is already stabled there then you can only stable on 27 top (25 road).

To exit you'll need to use shunt signal WF12 (and WF10 if you're coming from the bottom). Drivers must not pass WF12 unless WF4 is cleared first - that's the one part way down the Eastbound platform that we looked at above. Now drivers can't actually see this signal from the siding, but they will see that the route indicator associated with is illuminated and that's good enough as it means they won't be stopped part way down the platform. As also mentioned above, WF4 has a third route (the first two being 21 & 22 roads) - this third route allows you along the platform to WF6 and thus means we can fully berth the train in the platform (or continue via WF 6 to 23/24 siding).

28 road

28 road is East of the station, adjacent to the Westbound track and can only be accessed from the Westbound platform via WF26. 28 road can handle one C, D or S stock.

Exiting 28 road is as straightforward as entering it - WF130 back to the Westbound platform.

I would assume an error on the drawing.

As Tom said, its an error on the drawing.

I didn't draw it though! It is one of several on a shared drive we have at work for training purposes - though I did remove all the track circuits and other irrelevant stuff to make it easier to read.

I believe this is how the signal A675 should be shown:

Remember 21-24 roads used to take 8 car stock in the good old days, and there used to be 32 road coning off 23 road to take a 2 car set, and another spur off 25 and 27 siding that could take another 2 car set. there was a separate thread about that quite a while ago.

The cabling to the shunters set up panel as been cut this was done in the early 2000's when the panel was put in a nice cabinet and the building it was in was refurbed.

[Moderators, perhaps this post may be better served in a thread called 'Parsons Green and the S7s' which has a layout of the area but the thread is dormant since 2014, or SSR resignalling?]

Despite passing through Parsons Green daily, I'd never realised S7s cannot start service from Parsons Green station when heading east if coming from 21 siding or 22 siding. Last Thursday morning, due to a signal failure in the morning (Sept 15), TFL was reporting 'no service between Parsons Green and Wimbledon (at about 7:10am onwards), and severe delays between Parsons Green and Edgware Road.' This is common when the area between East Putney and Wimbledon has issues, and usually trains terminate at Parsons Green from the east, run into 23 or 24 siding to turn, and head back east by collecting passengers at Parsons Green. This is a very common occurrence and has been used at least half a dozen times this year at least.

I arrived at Parsons Green at 7:22am Thursday and the platform was very busy. No staff were visible but barriers were not left open. Between 7:22am and 7:50am four trains arrived from the east and were all cleared out on the Wimbledon bound platform. All were done by the driver, no platform staff, so took a while. Two went into sidings 21 and 22. Two eventually actually went on to Wimbledon as I assume things improved down the line. Both trains coming out of sidings 22 and 21 were set up for Edgware Road. But, both came out of the sidings and did not stop at Parsons Green. By that time, there were well over a thousand people on the platform. I happened to notice the trains rejoin the main line too far down the eastbound platform to start from Parsons Green. I think about two carriages would be off the platform at the Fulham Broadway end if this was attempted.

But, why would TFL advertise a service from Parsons Green when there wasn't one? Who would make the decision to run the terminators into Sidings 22 and 21, and not 23 and 24 as has been done in previous disruptions? There was no eastbound traffic from Putney Bridge during the whole period so no blocking issues.

Anecdotally, since SMA5 went live, I've seen more trains terminate and start at Parsons Green than in the past decade (including Putney Bridge terminators in that). Will this issue with entering traffic from sidings 21 and 22 be solved with the planned yard changes and 'SMA12 lite'?

At 750am I left and got a bus. Hundreds, including school kids travelling alone, were still walking to the station given TFL was still saying there was a service from Parsons Green.

 

I was reversed via 23 siding yesterday afternoon and another train following me was reversed via 24 siding so they're definitely back in use now.