Home |
Search |
Today's Posts |
![]() |
|
London Transport (uk.transport.london) Discussion of all forms of transport in London. |
|
LinkBack | Thread Tools | Display Modes |
#11
![]() |
|||
|
|||
![]()
On Sep 10, 11:59*am, "Recliner" wrote:
wrote in message On Fri, 10 Sep 2010 11:38:30 +0100 "Recliner" wrote: wrote in message On Fri, 10 Sep 2010 08:53:12 +0100 Roland Perry wrote: In message , at 20:05:28 on Thu, 9 Sep 2010, remarked: You would have thought the signal allowing trains out of the bay platform would be interlocked to the points being set correctly for the route over the crossover, wouldn't you? Even in the presence of a fault condition (which they've apparently admitted)? So much for signals being failsafe. Failsafe unless the failsafe fails. Which it obviously did. Surely it was still failsafe? *No trains were signalled to collide with each other. Only because the oncoming train was still had 1km and some signals between it and the station. If it had been 100 metres away we could be looking at a very different situation. Not as I understand it. After all, Tube trains routinely follow each other all the time, just a few hundred meters apart. They are signalled along the same route, but the signals also stop them occupying the same sections. So in this case, even if the trains were on a collision course, surely the signals (and train stops) would actually have stopped them approaching each other too closely? That is working in the same direction. At junctions where trains are "head on", the signalling would act to stop a train clear of any conflicting move if, for example a SPAD occured. A train on the wrong line doesn't have this benefit. Boltar seems to know what he's talking about. |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
Investigation under way after Tube train collision | London Transport | |||
The case for free train travel - response to the guy who sent me the link | London Transport | |||
Are emails still being sent for auto top-up? | London Transport | |||
But of course.... | London Transport | |||
Bendy bus off course | London Transport |