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Much of this discussion is fascinating. It might be worth remembering that all this will have been though through: During the pan European development of ERTMs (incorporating ETCS and GSM-R) Some twenty plus years ago. The U.K. was represented on the steering committees by what is now Network...

Some Siemens point machines are designed with combined motor and detection over the same four wires. On a Contract in Finland with WESTRACE interlocking and Siemens point machines a complex relay interface had to be designed that cost a small fortune. Presumably SIMIS takes this into account in...

Just a quick reminder. Where references are made in this thread to Siemens, this is the German company before they bought out Invensys/Westinghouse in the U.K. in 2013. One of the reasons Siemens won the Bournemouth and Portsmouth Contracts was to enter the U.K. market, but using their own...

Agreed, however these would probably be more to tell the driver to proceed linked to the timetable/headway rather than a block marker, although I don’t know if the Victoria Line control system could do that. Other mass transit railways have similar indicators either as a pseudo signal or a count...

ETCS is just another Automatic Train Protection (ATP) system. The first ATP system in the U.K. was commissioned on the Victoria Line nearly 60 years ago. The Victoria Line has never had a back up system of lights on sticks. OK that was a brand new line, but the same principle applies to the...

It’s also easier to interface Westcad with other digital systems such as Computer Based Interlockings (e.g. SSI, Westlock, Westrace, Smartlock), legacy remote relay based Interlockings using Time Division Multiplex communications and train describers. There are probably other digital interfaces...

Zonegreen are a specialist supplier of depot protection systems, based in the U.K., they have also supplied to the export market. https://www.zonegreen.co.uk/products/depot-protection/

Consequences of Storm Burt and for that matter any disruptive event. I do wish WestMidlands Trains would train their staff to use sensible sources of train running data. I intended to travel from the Hereford to New Street line yesterday (Sunday) morning. I checked Real Time Trains (RTT)...

Suggest J.D.Francis’s book ‘The Style ‘L’ Power Frame’ if you can find a copy. John used original information from Westinghouse.

Edinburgh Waverley (21 platforms), 1976/1977 winter Resignalling. Started with weekend closure in Princess Street Gardens cutting for new track layout to be installed, commission to new signalling at the Haymarket end and fringe to existing miniature lever frame at the Mound Tunnel. Then...

The WC&P had a connection to the GWR at Clevedon. https://www.railmaponline.com/UKIEMap.php

ETCS is just another Automatic Train Protection (ATP) system, the first in the U.K. being on the Victoria Line. Functionality and the means of delivering information to the train has advanced significantly since the 1960’s, particularly with the ability to use radio to expand the volume of data...

Try Ffestiniog Travel for European tickets: https://www.ffestiniogtravel.com/rail-ticket-service

For worldwide coverage you could try this: https://www.openrailwaymap.org/mobile.php?

It would be perfectly possible to overlay axle counters on this connection to overcome a track circuit failure. This was done on Hong Kong MTR back in 1988 where a track circuit failure on a headshunt point would have stopped the job. Just need to add an ‘OR’ function in the interlocking...

Alongside and just to the west of Linford Strret Junction sees the Eurostar chord towards Waterloo. If you can zoom in to Google Earth in 3D you should be able to find it. Another way of describing it is where the Chatham Line is on the viaduct, the Relay Room is on the level of the line at...

Quite a few of the scheme plans I had got wet during location case surveys! I walked most of the scheme twice. I don’t remember old signal heads etc. being kept, it’s possible some predated the use of SL35 lamps as installed pre-war so incompatible with 1970’s standards. BR had already replaced...

The Victoria Area Resignalling Scheme (VARS) retained a number of signal structures from previous installations. They would have been 40 plus years old in the early 1980’s so 80 years old today and life expired. That may be the reason for replacements being installed. It’s also possible that...

Most narrow gauge lines still have predominately steam hauled passenger services, yes even the Ff&WHR where no scheduled diesel services are planned for 2024, and haven’t been for some years. Why? NG locos require considerably less fuel per passenger mile, even Garratt’s when hauling a ten car...

Audio frequency Jointless Track Circuits have been used under 25kV traction systems for many decades, however it will depend on the type of equipment installed. If Reed based, please replace (I was involved with these in the 1980’s), but I would expect with suitable changes to accommodate the...