Germany has begun a major project of rehabbing its ICE high-speed lines.
For fans of track construction / MOW equipment, the following page from Plasser & Theurer (major manufacturer of heavy MOW equipment, also used in the U.S.) has a variety of interesting photos:
https://www.plassertheurer.com/en/media-library/documentaries/face-lift-for-high-speed-lines.html
-- Ernest