SSR Resignalling

I’m not sure there’s that much installation out towards the Amersham end, certainly the last of the SERs are barely complete. Presumably there’s also a fair bit of development still needed on the inter-running sections. With the comments made elsewhere about the undesirability of a migration boundary at Preston Road, it would appear logical simply to stick with Finchley Road. This does of course overlook any issues with the legacy signalling, and in particular the cost-effectiveness of keeping it going. Others will no doubt be able to comment more, however Finchley Road to Uxbridge (excluding Harrow to Wembley) seems to date from the 80s, whereas north of Harrow is 1950s. I can well see how we would be coming to the point where expenditure would be required. My sources seem to be of the opinion that it would probably be more worthwhile simply to stick with the CBTC, but subject to the money actually being forthcoming to do that. Worst case is do nothing, which presumably would ultimately lead to running with a high rate of failures.

In any case this is all a little way into the future, as presumably completing the circle would be first priority, not least as this offers the greatest benefit in terms of performance uplift.

Yes, only because the other train is not in a fit state to run so will be swapped under a concession. Issue with heights on the train.

Yes, I was aware of the reason. Having the Senior Project Manager concerned in the same team has its advantages...

That would be my view too, but remains to be seen.

As the boundary is mid-way between stations there probably would be a need to retain three existing signals to maintain signalling headway, but these could be retained as auto signals and monitored by CTBC.

That's one of the problems with the suggestion to do a PICU on Parsons Green. The vital signalling is now sixty years old - twenty years longer than its design life. It has been rewired once already, and the outside cabling is in a poor condition - like many similar cables of the same vintage.

It's not logical to put it into the Griffin Rooms - it would then be an island rather than an integrated part of the Piccadilly line.

And yes- the Picc was relocated surprisingly cheaply - mainly because the PICU project made a very deliberate decision not to remove any of the equipment they made redundant, but instead leave that to the full Piccadilly Line Upgrade to resolve. Naturally that decision was made at a time before Emergency Budgets were even a remote possibility, but it means we have rooms often half-full of redundant equipment which will remain in situ for many more years to come.

Well, it’s not like Cobourg Street has been re-used for anything! The Vic Line desks I believe found their way to a museum as did parts of the illuminated diagram, but apart from that the room looks just the same today as it did the night it was closed.

The Coburg Street building houses a very important ventilation shaft for the Victoria line.

It's not just the time expired equipment and cabling on the track. Old equipment rooms have air conditioning that needs to be maintained.

Still plenty of locations on both lines where redundant equipment and signage is still in situ. Some instances are unorthodox to say the least!

From FB group Bakerloo & Jubilee Lines Past & Present

Emergency stop lights.

Some of them are still around but not commissioned with the plungers on the platforms

Got a picture?

oh my, that looks, erm, 'good'. Just three white lights, no coloured lights. (is there an 'evil grin' emoticon?)

I wonder if that could still work, if so it could be put to good use - for instance on Hallowe'en. Ghost of the dead signals coming back to haunt everyone on the one day when our culture says that hauntings are permitted and even expected.

Any update on SMA3?

Easter 2021 we are hearing

Yes, and you will find the answers and discussion on page 33: districtdavesforum.co.uk/post/492750