13-09-2018, 07:29 PM
(13-09-2018, 05:28 PM)REMBrum Wrote: Afternoon All,
Please see attached mod 2 2015 layout attempt and calculations.
Any advice, comments or questions very welcome.
I think I have made an error in the down branch entrance and exit signals.
I have already noticed that the dock line head shunt has not been numbered and is missing a MARI- any other obvious mistakes please let me know.
Many thanks.
A quick look and I have "spotted" several missing trap/catch points for goods lines etc (I'm assuming UK mainline since I can't see where you've said) Also the interrupters you have shown are wrong - any train over the points will break them the way you have shown them.
The single line is oversignalled IMO. I'd do One-Train-Working for Axle counters (like Windsor branch on the Great Western) so you'd need a fixed distant or distant board and bufferstop lights at H, with signals controlling entrance/exit to the branch roughly where you have 45/46R
Your points normal lies and numbering look good, and the traks around them - just one joint too many on the scissors.
A subsidiary signal (shunt/call-on from main signal) has just 2 lights on the diagonal, whereas a ground shunt signal has 3 - horizontal and diagonal (yours are creeping towards vertical).
I may be wrong on this, but I think the 37 second strike-in is for AHBCs which are not interlocked with signals. As MCB-CCTV crossings are interlocked, it needs to allow time for the barriers to be detected down and crossing clear given before an approaching train (driver) sees a caution aspect on the approach to the protecting signal. (i.e. 27s before sighting the YY before your signal 12 @R).