"Tom Anderson" wrote in message
rth.li...
On Wed, 16 Jun 2010, Andy wrote:

The central London tunnels will be built to an increased loading gauge.
The planned running tunnel diameter of 6.2m is nearly as large as the
6.3m RER tunnels in Paris and certainly big enough for most continental
stock.

Any idea what that corresponds to in either W6/8/12 etc terms or UIC
A/B/C? And whether other constraints for those gauges (or kinematic
envelopes or whatever we're supposed to call them now), like radius, will
be met?

Another relevant point, is that Crossrail has continuous walkways in the
tunnels, so the running line is not centred in the bore. That presumably
means all the theoretical height gained is not actually usable?

But as I said in an earlier post, the trains have to fit the existing
tunnelled parts of the route, especially the single track Connaught tunnels
under the docks beyond Custom House...

Paul S