I don't think you have true HSR in IL. The top speed is what, 110 or 115?
TX HSR is planned to use Shinkansen trains, "Capable of operating at speeds in excess of 200 miles per hour." From the website:
"The Texas High-Speed Train will operate on secure, separate, closed tracks dedicated fully to high-speed passenger trains with no sharing with freight or other passenger rail services, and no dangerous roadway intersections for vehicles, pedestrians or animals to have to cross."
https://www.texascentral.com/project/