Here's my layout: The Topeka, Kansas City, and St. Louis.
Layout features the Atchison, Topeka & Santa Fe Railroad around 1969-1971 - allowing for modeling of Super-C Service, Passenger Service, Mechanical Reefers, and Auto Parts service. Also will feature rolling stock from roads I commonly saw on the ATSF when growing up in Topeka including the Frisco, Rock Island, Rio Grande, and M-K-T - but it is primarily Santa Fe.
Unfortunately, I started the layout not knowing enough about all the designations. I've used Gargraves 3-Rail track to start - not knowing I could buy Gargraves 2-rail high. Any future track or switch purchases will be 2-rail high and over a few years I'll either replace the 3-rail or remove the middle rail. I suspect replacing would be simpler. Plans call for 100% Dead Rail operation utilizing BPRC and Bluetooth Control.
Thanks for reading, thanks for all the help, and I hope you enjoy the process!