A Northern Line "Special" and general LU mistakes!

The Special TD is sometimes used for ECS movements, engineers trains or in-service movements that don't fit into the TDs provided (i.e. Highgate to Golders Green via Kennington, which might be one such movement).

BAET once said that a Special TD has to be routed manually through junctions, which is why it isn't often used when engineers trains are about.

I presume they must do. I was on a train that was meant to be going to MHE, but due to signalling problems we were told (between Camden and Kentish Town) that the train was going to terminate at Archway. The signaler/line controller or whoever had changed their mind by the time we got their though (but the in-car display was still saying Archway until about East Finchley)- but it wasn't until we got to Finchley Central that it was certain whether it was going to MHE or High Barnet (they eventually chose the latter).

Chris

some dot matrix signs are not programmed when a special t/d is put on a train if this is the case it will show a blank but most signs will say not in service

the top end of the northern is controlled via programme machines so a special would not be on the timetable roll so yes they would have to be manually routed through the area in push button mode

Did I??

If a site has special as an option I don't believe it can transmit any destination info. This is why Tom B would have seen an Oakwood TD today, it makes life easier for the Signal Ops at E/Ct as the train can be auto routed.

Oh, and those spelling mistakes are nothing. One DMI on the northern today was scrolling 'Central Line suspended between Marble Arch and North Acton due to planed (sic) engineering work'

I think so. Naturally I don't remember where, of course...



I think that was what you said elsewhere, and why I remembered it when I stated that factoid about the Special T/D.