Here is a video from a N scale modeler in Italy modeling the SP.  

Here is the main website:  http://www.sp-coastline.com/

I found it very helpful:

For past few weeks I have been studying prototype yards and to my surprise I have seen many turnouts without guard rails. For example pictures from West Colton yard. How common is this? For model railroads with small turnout #'s I can see them needed.

Another subscriber of MRH sent me a picture showing a crossover from a main line to a lower siding and I thought it was useful as this situation comes up often in modeling track - How do you make the transition?

My layout is wired and running with a traditional DC system. I am thinking that I would like to set the layout up such that I could continue to rum with DC equipment on occasion. But then, I want to install a separate DCC setup and run DCC equipment separately on occasion. Can I just have the two systems wired to the bus wires and switch from one ot the other? What sort of switch should I use? Does it have to be heavy duty since DCC is a stronger current or whatever that concern might be? What other issues are there- if any?