"Mizter T" wrote in message
...

On 22 Jan, 18:25, MarkVarley - MVP
wrote:
I've often wondered and was reminded today, why is there a delay in
opening the doors for trains arriving at Victoria?
At other terminating stations the doors are released as soon as the
train has stopped, but at Victoria there seems to be a delay, anyone
know why?


You're talking about the arrival of Electrostars into Victoria
mainline station. I don't know the details, but basically they used
GPS to get a fix on where they are. As a safety measure, they also
have a system that means drivers (or can guards also do this?) are
only able to release (i.e. open) the doors on the correct side of the
train. In the western (aka Brighton aka LBSCR [1]) side of the station
the platforms and the approaches to the platforms are all covered up
because of a number of developments that have been built 'on top' of
them - this all messes up the GPS signal reception from the satellite.

Do they really have so little trust in the guards to open the right set of
doors, they have to implement this?

And anyway, it's OK for stations where the platform can always be
determined, but al London, Clapham, E Croydon, Brighton (I could go on), the
actual platform a train is going to arrive at isn't always determinable.
(No, GPS isn't accurate enough to say if its on the up fast/down slow/etc
track.)