On 30/01/2013 23:36, Peter Smyth wrote:
"Spyke" wrote in message ...

On 29/01/2013 19:45, Peter Smyth wrote:

Would be nice if they could provide the full weekday service before
worrying about Sundays.
Queues back beyond the top of the ramps at Waterloo at 9am today,
which usually means at least one train out of service.
Who on earth thought running a timetable that required 100%
availability was a good idea?

So you would rather they always ran a four train service, even when all
five trains are available? It seems better to run five trains when
possible, and accept that sometimes one will be out of service.

By all means, use all 5 when available. However, during the 2006
'upgrade', commuters were sold a 'capacity increase', which was
actually nothing more than sweating the existing assets by requiring
100% train availability. This was never going to be realistic in the
long term, especially given the reliability of 1992 stock and the
limited maintenance facilities available.

If TfL had wanted to provide a genuine capacity increase, they
should've looked at increasing train lengths (plenty of spare platform
at both ends) or improving the signalling to allow tighter headways
and faster platform reoccupation, instead of the trains crawling along
and waiting at signals or in the depot as they do now.

But they did improve the signalling during the closure - hence why they
can now run five trains at once instead of four trains.

As for increasing train lengths, I suspect the main constraint is the
very limited depot space available for stabling rather than the actual
platforms.

Peter Smyth

Err ... the platforms at Bank can only take four-car trains.