I had seen some headlines this week where I did not read further, but one today caught my eye due to an interesting photo of the nifty trackage. A bit beyond any complexity on my 5’x9’ layout. Interesting that they say the problems come from some timber ties that are a bit too aged. (You have to ignore the politics and finger pointing.)
http://www.beloitdailynews.com/article/20170406/AP/304069666