2011 Mod 3 Control Table attempt

[PJW]

Reuben Thanks for sharing the load and responding to this thread!

Just one comments and this applies to anyone claiming to do the Control tables to NR current standards; 11202 was reissued a couple of years ago now and yes for SSI it does mandate a sub-route / sub-overlap releasing table and then route tables that only declare the relevant sub-route. The change was to make the CTs more aligned to the data structure and also give testing efficiency and open the door to have CTs matching the functionality of different interlocking systems suh as SIMIS-W that operate rather differently.

I don't suggest this approach for the IRSE Exam, but candidates do not claim to be doing Control Tables to "NR current standards" unless you really are!- similarly if you don't want to get involved with complicated post SPAD aspect reversion, better to say "Network Rail standards c2000".

Route controls:

Good- opposing routes handled correctly.
Selection of available swinging overlap also correct.
I know what you’re trying to express, but it’s not the custom to state “OFZ-BA free”, as this assumes you have a separate control table expressing how OFZ-BA operates. In practice, you need to end up writing a very complex expression to express how “OFZ-BA” is free, in terms of other routes, track circuits and points – see my model answer. Realistically, you won’t have time in the exam to handle this, and the examiners are unlikely to award many marks for it - you’re better applying effort to the easier stuff.

Reuben