For railways and the mine cart railways in particular, RACK RAILS to allow for trains to be able to climb over steeper gradients. Trains would move slower over them. Alternative is to
India 2016 - Nilgiri Rack Railway - YouTube
The tourist rack railway train of the Rhune (France). Le train touristique à crémaillère de la Rhune (France Stock Photo - Alamy
Stadler wins contract for rack-and-pinion rail vehicle in Switzerland
The Rhune Rack Railway in Sare - near the 3-star hotel Lastiry
Rack Railways
Rack (Cog) Railways of the World - Europe
Rack railway - Wikipedia
Rack (Cog) Railways of the World
Rack railway - Wikipedia
Wendelstein Rack Railway (Wendelsteinbahn), Bavaria, 2024