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  1. ptreanor

    Is the chord that links HS1 towards Waterloo still in use?

    Yes, class 92 locos can work the extent of HS1 but not into St Pancras. In reality, they only work as far as Ripple Lane (Dagenham).
  2. ptreanor

    Is the chord that links HS1 towards Waterloo still in use?

    KVB (like TPWS) is always active on-board so there isn't the need to automatically arm it or disarm it. TVM IS automatically armed and disarmed by "ITL" loops in the track. Class 92 locos use "APC" magnets mounted on the sleeper ends to check that the TVM has armed, in lieu of KVB (the APC...
  3. ptreanor

    Is the chord that links HS1 towards Waterloo still in use?

    I repeat, class 92 locos are not equipped with KVB (only AWS, TPWS & TVM430) and they are not permitted into the train shed at St Pancras. Eurostar (and other TGV types) use KVB to check the operation of TVM once armed and not to arm it initially.
  4. ptreanor

    Is the chord that links HS1 towards Waterloo still in use?

    The Class 92 locos are NOT equipped with KVB train protection.
  5. ptreanor

    Is the chord that links HS1 towards Waterloo still in use?

    The "Waterloo Connection" runs between Southfleet Juncton on HS1 and Fawkham Junction on the Chatham Main Line, it largely follows the route of the old Gravesend West Branch and it is still open (but is seldom used). It is electrified with 25kV catenary with cab signalling at the HS1 end and...
  6. ptreanor

    Most exhilarating station approach

    Going from below ground level to above ground level whilst doing 270k alongside Ashford International Station takes some beating...
  7. ptreanor

    Why is the French name for Brussel-Zuid not Bruxelles-Sud?

    This is my understanding. Midi equates to south, that is where the sun appears in the sky at midday. Simples!
  8. ptreanor

    Crossrail opening delayed until sometime in 2021

    But my original point was that the Crossrail YouTube video seemed to be over overplaying TPWS/AWS/CBTC integration rather than focusing on the real issues which appear to be related to other systems integration within the core section.
  9. ptreanor

    Crossrail opening delayed until sometime in 2021

    Didn't TfL choose CBTC because they felt that ETCS hasn't demonstrated sufficient maturity? The system integration issue seems (IMHO) to be a bit of a red herring when one considers that the initial service through the tunnel section only operates between Abbey Wood and Paddington low level...
  10. ptreanor

    Crossrail opening delayed until sometime in 2021

    There is no doubt that required multi-system integration is complex but I do get the impression that it's being a little overplayed in order to manage expectations. Transitioning from one signalling system to another is not new to the UK, Eurostars and Javelins have been doing it for years and I...
  11. ptreanor

    HS1 to HS2 link - possible in the future?

    I presume your reference to HS2 being equipped with TVM43O meant to say HS1. HS2 will be equipped with ETCS L2.
  12. ptreanor

    Azuma Class 800 Traction Manual

    Surely such documents are only issued on a controlled basis and then only those that require them. Does strike me as a peculiar request.
  13. ptreanor

    Longest Tunnels in London

    Deceptive with the line speed being 230 kph!
  14. ptreanor

    Heat related issues (25 July 2019 and subsequent days)

    There's the answer then, go for French LGV style track and catenary, wouldn't please the "not invented here" brigade though....
  15. ptreanor

    Heat related issues (25 July 2019 and subsequent days)

    The speed sign that you refer to relates to a speed restriction at braking distance ahead and not at that location.
  16. ptreanor

    Are too loud and too many PRM alarms and announcements making travellers uptight.....

    Automated announcement heard on a recent GWR West Country service approaching Reading, "change here for Bournemouth, Gatwick Airport and Oxford". Surely such people are on the wrong train!
  17. ptreanor

    HS1 operating incident?

    TVM 430 cab signalling is a speed signalling system. Speed signalling (as opposed to route signalling) is used throughout Europe and (generally) provides no indication of route. The assumption is that trains are routed as per the timetable requirements. There are no safety implications with this...
  18. ptreanor

    HS1 operating incident?

    The issue with the 374s not calling at Ashford is not related to the signalling system. KVB train protection was introduced at Ashford last year and I believe that system is working just fine.
  19. ptreanor

    Signal box communication

    Signalling centre / signalbox train describer systems (and their modern derivatives) are linked together, either directly or are networked in some way.

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