On Tue, 25 Mar 2008, Andy wrote:

On Mar 25, 8:00*am, The Real Doctor wrote:
On 24 Mar, 23:10, Adrian wrote:

On Mar 24, 4:00 pm, Dan G wrote:
Anyone seen a more detailed costing of the scheme? *Why* is it costing
so much more than other, not dissimilar, projects?

In part it will cost a lot because it will be (or should be)
engineered to a very high standard. *The Jubilee Line extension is a
pointer in that respect.

But it is predicted to cost more than five times as much as the
Jubilee Line extension ...

You have clearly never lived in a city where good spacious (1,000 sq
ft per person) affordable housing is available to middle class
workers. *Or, enjoyed one where a normal comfortable journey to work
is 40 minutes or less.

And how many people do you think will find good, spacious, affordable
housing as a result of this line. It'll knock quarter of an hour,
tops, off the journey onto London - are those fifteen minutes really
deterring millions from moving to good, spacious, affordable housing?

But wasn't the main justification for crossrail the relief of the
overcrowding already present on existing lines, as well as allowing
for predicted growth. It will take a fair number of people off the
Central line (and other Underground lines) as well as providing extra
capacity on the National Rail lines to either side.

Except it won't. It will relieve the Central line west of Stratford, for
sure, which in practice means Stratford to Oxford Circus. But it doesn't
actually add any capacity at all to the Great Eastern or Western railways
- every path that Crossrail will use is currently used by a normal train.
Crossrail trains will be a bit longer, but you could deliver the same
capacity increase by adapting those lines for longer trains without the
central tunnel bit for a lot less money.

The fact that it will reduce journey times is an added benefit, but not
the main justification for the construction.

It also won't reduce journey times much. Trips you can make with Crossrail
can currently be made with train plus Central line via quite easy changes
at Stratford or Ealing Broadway (or more painful ones at Liverpool Street
or Paddington, after a quicker run to the terminal). It will make the
trips a lot more convenient by eliminating those changes, but not hugely
faster.

tom

--
I believe there is no philosophical high-road in science, with
epistemological signposts. No, we are in a jungle and find our way by
trial and error, building our road behind us as we proceed. -- Max Born