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2006-06 A Sequence Schedule
From Donboy
2006-06 A Sequence Schedule All is green with the spring rains and some of the rooms in the remodel should be completed this month. It will be nice to get to the point where space in the house will be increasing because for months the space we have to live in has been decreasing as we move things out of the way of the remodeling. I have hopes that the tide will turn this month as some of the new rooms get completed and we can start moving into them.

Lacking time to build my layout I have a chance to reconsider my last idea of double tracking my mainline. I do have problems with my projected number of trains on a single track but a double track mainline is going to far in the other direction.

My layout design includes three towns (I will call them A, B, and C) plus a staging area after C. I was planning on putting my yard in town C but looking at traffic it seems to work better if I put my yard in town B. It happens that my benchwork is close to the same size for each town so it is easy to move them around.

In my renewed effort to match my track to traffic I went back to a September, 1996 MR and read the description on how John Armstrong setup a sequence schedule on the Canandaigua Southern. I made a spreadsheet to use for charting my trains through a session. Starting with my single track design it was very apparent that it would not handle the traffic with one passing siding in each town so I was right about that. After some experimentation I found that adding a short section of double track and more passing sidings I could make a sequence schedule work. A sequence schedule also addresses my other goals no fast clock, easy dispatching and the ability to run scheduled trains between operating sessions.


p1

I found that I needed to adjust the number of passing sidings on A to four (solved by a section of double track with crossovers), B to four (reason for the yard move) and C to three sidings. With the adjustments to the passing siding capacity trains are able to move on each sequence without the whole layout getting plugged and grinding to a halt.

I will have to use some of the yard tracks for passing sidings at times, which I can make workable by the limiting the number of trains that need to be switched at the yard. In my previous plans I was expecting almost all trains to be switched while my new plans will have trains coming from staging that would not need to be switched in the yard at town B.

It is interesting to me how often I find the layout design answers I am looking for in the work of the model railroading pioneers. I wonder if this might be caused by my move into a totally freelance design and because freelance was the norm during the pioneer days their writing is now a better fit for what I am doing compared to the modern way of doing things.

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