12-05-2010, 09:34 AM
I agree entirely with Peter's comments.
If you've not yet studied the basics of the process for signalling a layout, then looking at a completed solution will not help very much! You're better not looking at this solution until you have studied sufficiently to be able to have an attempt at doing this layout, and then use this model answer to compare with yours.
Pending getting the study pack, here's a quick summary of the key steps, borrowed from my "signalling the layout" course!
This process does assume that you are already familiar with the basic items of equipment which you are placing at each stage. There's nothing wrong with you adopting this process for the signalling equipment and principles relevant to your home railway network - you don't have to pretent to live in Network Rail Land!
1. Perform headway calculations for the main line line of relevance in the specification, to determine the type of signals and what range of spacings they may be at.
2. Draft the positions of main signals, starting at fixed points such as junctions, and working away from these, placing signals at acceptable spacings. Try to position signals at overlap distance from pointwork, and with train standage on the approach. Often in the exam, features such as stations or junctions are positioned at regular spacings, which will guide you towards an expected solution. These features may also force you to provide a type of signalling which is more intensive than the bare headway calculation indicated.
2a. for other lines with unspecified headway requirements, judge a suitable type of signalling and then apply it in a similar manner.
3. Mark the limits of main signal overlaps.
4. When you
If you've not yet studied the basics of the process for signalling a layout, then looking at a completed solution will not help very much! You're better not looking at this solution until you have studied sufficiently to be able to have an attempt at doing this layout, and then use this model answer to compare with yours.
Pending getting the study pack, here's a quick summary of the key steps, borrowed from my "signalling the layout" course!
This process does assume that you are already familiar with the basic items of equipment which you are placing at each stage. There's nothing wrong with you adopting this process for the signalling equipment and principles relevant to your home railway network - you don't have to pretent to live in Network Rail Land!
1. Perform headway calculations for the main line line of relevance in the specification, to determine the type of signals and what range of spacings they may be at.
2. Draft the positions of main signals, starting at fixed points such as junctions, and working away from these, placing signals at acceptable spacings. Try to position signals at overlap distance from pointwork, and with train standage on the approach. Often in the exam, features such as stations or junctions are positioned at regular spacings, which will guide you towards an expected solution. These features may also force you to provide a type of signalling which is more intensive than the bare headway calculation indicated.
2a. for other lines with unspecified headway requirements, judge a suitable type of signalling and then apply it in a similar manner.
3. Mark the limits of main signal overlaps.
4. When you