On 9 June, 14:49, MIG wrote:
On 9 June, 14:40, wrote:





On 9 June, 00:38, asdf wrote:

On Sat, 6 Jun 2009 10:20:56 -0700 (PDT), wrote:
Oh ang on though, if they used platform 1 at HotH, I think there may
be a crossover. *Not sure if it isn't just a track crossing to/from
the Metropolitan or if it leads to/from the up Chiltern track as well.

I can't remember if this crossover can be used from Up departures from
Platform 1 at Harrow. My memory tells me that there is no signal for
this route. What I can't remember is if the crossover from the NB Fast
to the Platform 1 just passes over the intervening Up line or whether
there is pointwork in the Up line allowing access.

There isn't pointwork - it's one of those things that I think is
referred to as a diamond crossing.

Thanks, I though it probably was, but couldn't remember.

It can't be that simple though, because it has to allow for
Metropolitan trains in both directions, doesn't it? *So there must be
something from the up Chiltern to the Met as well as the diamond from
the Met to the down Chiltern, even if nothing from platform 1 to the
up Chiltern?



Platform 1 is only accessible from the Down Chiltern and the NB Met
fast, via the diamond crossing, heading north (to the NB Met fast),
with no access heading south without a shunt. Platform 2 only has
access to the Up Chiltern, heading south from the SB Met fast, or the
NB Met fast heading north via the trailing crossover. There is no
access to other Met line tracks (i.e. the both southbound, NB slow or
the Uxbridge lines). Met line trains only use Platform 1 heading
north, from the NB fast or platform 2 reversing from SB to NB. There
are no other Met line possibilities, with the current layout.