On 2015\11\01 10:15, e27002 aurora wrote:
On Sat, 31 Oct 2015 12:01:38 +0000, Basil Jet
wrote:

By 2030 the Waterloo trains will probably all be electric or bi-mode. I
suggest a new twin-tunnel mainline from Hersham to Clapham Junction with
a pair of tunnelled platforms at Kingston, to replace Surbiton as the
principal station in the area. That would free up lots of room on the
surface lines through Wimbledon and Surbiton for more local trains which
could then go into the CR2 tunnel near Clapham Junction in approximately
the same place as the mainline tunnel ended.

Now that really is expensive.

Why? Tunnels are cheap, especially under parkland: it's underground
stations that are dear, isn't it? Actually, let's run the new mainline
from Esher to Clapham instead, thus avoiding two tunnels under the
Thames and bringing the cost down. Surely a 9 mile twin tunnel with a
pair of platforms under Kingston would be cheaper than a pair of six
mile tunnels with a two-platform station under Balham and a
four-platform station under Wimbledon? (ignoring all tunnels at and
north of Clapham Junction, which would be the same in either plan).
Crossrail2 would then have loads of room on the existing four tracks
through Wimbledon and Surbiton to do whatever it liked, and access to
the new depot at Weir Road would be simplified by having all of the
Crossrail2 trains running past on the adjacent surface railway.

I've come up with a name for Crossrail2... BendSinisterRail, or just
SinisterRail for short.

https://en.wikipedia.org/wiki/Bend_(..._sinister. 22