I have recently dramatically reduced the number of derailments on my Postwar O Gauge tubular track "around the walls" layout. My layout is 35 feet long, and 3 to 4 feet wide. It is essentially a switching layout with 16 switches, 2 independently powered and interconnected main lines, 8 sidings and 1 passing siding. The sidings are also independently powered and interconnected.
Although I've reduced my derailments, I still get an occasional derailment, maybe once or twice every other operating session, which is usually about 30 minutes long.
I also happen to know that some of you have much larger and complex model train layouts than mine, and have a record comparable to real railroads when it comes to derailments, running trains almost every day and maybe having 1 derailment per decade!
I would love to know, my fellow Forum members, about your layouts, how often you have derailments, and what you have done, if anything, to reduce them.
Later on, I will share what I've done to reduce my derailments.