It would be so wonderful and for all Train Simulators in the past this has never been realized as a feature. Then you could also build mountain railways like the Matterhorn-Gotthard-Bahn, Zentralbahn and Appenzellerbahn, where you switch between adhesion and cogwheel drive, or cogwheel railways like the first among them, the Mount Washington Cog Railway. Anyone can then build their own rack railways.
