Double curve. The inner curve uses the 23-straight geometry described by Holger Matthes in RB 1, but in a two-layer ballasted build designed to sit on a tile layer atop baseplate, which makes the profile PennLUG-compatible.
The outer track uses 24 straights plus a flextrack at either end. (If you are using 9V, you will need a custom half-straight at one end instead - this is how PennLUG is doing their own wide curves.)
We had zero derails over a two-day show. And it makes an authentic clickety-clack when the trains go over it.
(Do we talk enough about track that it needs its own category?)
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