TheOneKEA wrote:
Dave Arquati wrote:


As for Wapping, the expense of extending the platforms could
jeopardise the whole of Phase 2; I wonder whether TfL would
rather try to negotiate with the HMRI or whoever to allow long
trains to serve the short platforms there ("For Wapping, use
front 4 cars only").



If common sense prevails, perhaps there will be an electronic door
control system that allows a driver to flip switches to selectively
isolate doors on individual units. This would allow _any_ four cars of
a train to be used at Wapping.

How much would it actually cost to extend the platforms by four cars
and additionally widen them if the H&S mafia decree it?

Bringing the station up to the required standards would cost a Wapping
£100m.

It's not just platform extension/widening, there are other "safety"
issues as well... apparently Wapping already doesn't satisfy a number of
safety issues. It is on both a gradient *and* a curve (shock horror),
and has no secondary means of escape in the event of an evacuation.

It's also difficult to perform any construction works to rebuild the
station, as the ground is quite waterlogged and the works involved would
cause the station to rise by 220mm, so further works are required to
prevent risks such as "flooding, movement, cracking and movement in
adjacent buildings, the possible collapse of the existing railway tunnel
because of ground movement or arch collapse and a prolonged construction
duration, which would close the site for one year".

The £100m = £54m costs + £13m to prevent "lifting" of the station + £33m
Treasury budget risk.

I unearthed the following Hansard Debate from Google:
http://makeashorterlink.com/?C1BC2181A

--
Dave Arquati
Imperial College, SW7
www.alwaystouchout.com - transport projects in London