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All across the Great Western territory => The Wider Picture in the United Kingdom => Topic started by: Worcester_Passenger on August 01, 2012, 19:10:05



Title: Oops! (London Bridge, Wed Aug 1)
Post by: Worcester_Passenger on August 01, 2012, 19:10:05
From the BBC (http://www.bbc.co.uk/news/uk-england-london-19075437 (http://www.bbc.co.uk/news/uk-england-london-19075437))

Quote
Rail services to London Bridge, one of the hotspot stations during the Olympics, were delayed during the morning rush-hour.
Some passengers were stuck for about 20 minutes outside the station due to "operating problems".
...
A Southern Railway spokesman said the delays were caused when a train was signalled into the wrong platform at the station.
The 10-carriage train arrived at a platform intended for trains with eight carriages.
"It meant the train had to be sent back along the track, which caused congestion," the spokesman said.


Title: Re: Oops! (London Bridge, Wed Aug 1)
Post by: Electric train on August 01, 2012, 20:50:14
Longer trains have been laid on over the Olympic period they are not operating a special timetable, while it is embarrassing it is easy to understand the signaler making this mistake, London Bridge Signal Box is possible and most complex the busiest in the UK.

Generally so far (touch wood  ;) ) the system is holding up very well especially compared with last week  ???


Title: Re: Oops! (London Bridge, Wed Aug 1)
Post by: Btline on August 01, 2012, 21:19:42
Why not use SDO and just dump the passengers from the front 8 cars?

Did it too long to clear points/ signals? Even so, surely quicker to just dump!


Title: Re: Oops! (London Bridge, Wed Aug 1)
Post by: bobm on August 01, 2012, 21:20:09
Longer trains have been laid on over the Olympic period they are not operating a special timetable, while it is embarrassing it is easy to understand the signaler making this mistake, London Bridge Signal Box is possible and most complex the busiest in the UK.

Isn't the blame, as far as the railway is concerned, shared with a driver for accepting a wrong route?


Title: Re: Oops! (London Bridge, Wed Aug 1)
Post by: JayMac on August 01, 2012, 21:26:18
Why not use SDO and just dump the passengers from the front 8 cars?

The unit(s) involved may not have been fitted with SDO, or if they were it's probable that the GPS system used on a lot of Southern's stock is of no use when a train is incorrectly routed.


Title: Re: Oops! (London Bridge, Wed Aug 1)
Post by: Worcester_Passenger on August 01, 2012, 21:28:05
I thought that GPS could be inaccurate when the train is underneath an overall roof as at London Bridge.


Title: Re: Oops! (London Bridge, Wed Aug 1)
Post by: Electric train on August 01, 2012, 21:39:42
Southern do operate 2 car Units in and out of London Bridge so SDO would be no help to passengers in the rear coaches if it was a 2 car unit


Title: Re: Oops! (London Bridge, Wed Aug 1)
Post by: paul7575 on August 02, 2012, 10:47:03
I thought that GPS could be inaccurate when the train is underneath an overall roof as at London Bridge.

On the 377s they use platform end beacons (balises) to replace the GPS when under cover.  There were difficulties originally getting the train software to react quickly enough to the loss of GPS at the various covered terminals, (or on the underground Thameslink sections which SN 377s are also used on) but it's all fixed now.  Apparently the beacons are also used to differentiate which platform they are in when platform lengths differ at a particular station, as GPS cannot determine position accurately enough for this purpose.

Paul
 



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