Jack Taylor wrote:
Mojo wrote:
Pardon my ignorance, but what signaling problems would affect the use
of SDO, such as not releasing the doors in the rear coach?

Sorry, I wasn't very clear on that, was I? Willesden Junction will only hold
three cars. With four car units it would not be possible to pull forward
such that the inner sets of doors in the leading and trailing cars were at
the platform and the other sets cut out because of the position of the
station starting signal at the end of the platform. Either that would need
to be relocated or otherwise both sets of doors on the rear car would have
to be cut out (as that would be off the platform) - not very desirable or
customer friendly.


The Rules of the Plan give the following platform lengths for Willesden
Junction:

Low Level: Up and Down platforms - 125m, Bay - 67m
High Level: Eastbound - 55m, Westbound - 72m

I don't know how they worked that out, but that gives a 5 metre overhang
on the Eastbound with a 3 car set if it's accurate!

Cheers,

Barry