@firebreathingduck@social.vivaldi.net @chartier@toot.cafe You can't put high-speed trains on curvy tracks. Most of the time, they have to be straightened. Another challenge is that these tracks were built before they used thermite to join the rails. The rails had to be replaced to withstand the stresses. The CCP just seizes the land required, and when Japan rebuilt after WWII, it was less of a challenge due to all their infrastructure being destroyed