It's landscape just like in a fairy tale: The approval tests of new Stadler FLIRT trains were performed amongst others on the world-famous Gotthard railway. Within the comprehensive tests, there was a focus on the aquivalent conicity of the rail-wheel-contact. Get the full project story as download or on: 

https://pjm.co.at/en/blog/Showroom/high-tech-metrology-in-a-picturesque-landscape/