Re: A junction question

Keith & Chris,
Many thanks on the help... I'm not planning on using it as passing, just
straight from the main (At the end of the station) to the single branch to
the sidings. Does not using it for passing make a difference ?

Andy


"Keith" <grovenor@xxxxxxxxxxxxx> wrote in message
news:7kdb12h390tct4steresjsa92qsgq33ipa@xxxxxxxxxx
On 13 Mar 2006 14:39:14 GMT, Chris Wilson
<bigbounce@xxxxxxxxxxxxxxxxxxxxxx> wrote:

I don't know the real answer but most prototype track plans I've seen
relating to this situation give the impression that that the doubled track
following the junction prior to the single line appear to be long enough to
accomodate at least a typical branch line train and still leave the
juctions (with the main and the single) clear. IOW long enough to be a
crossing point.

Of course I don't know if this is definative or not but it appears to make
sense.

It was at least as common if not more so for the single line to
commence immediately at the junction where the junction signalbox
could handle the branch token or staff and all the points would be in
rodding range of the box.
For an extended double line section to be any good as a passing place
it would have to be 440 yards plus a train length to allow a branch
train to be accepted without blocking the main, or be equipped with a
trap point and sand drag. A train waiting to enter the branch cannot
be given the token while waiting so it was best if it could wait
before the engine passed the junction signal box, with a busy main
line this would suggest a loop line off the main before the junction
rather than off the branch after it.
But this will certainly fall into the 'prototype for everything'
department.
Keith


.

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