In Mondays stream it was said there would be a guide for signaling and safety systems for the acela released today. I can't seem to find it anywhere.
It’d be in Training Center. Select a loco (ACS-64 I believe has them), and the training modules appear. Hope this helps!
The ACS-64 and ALP-46 both have them. You can find them under the locos training modules section (To The Trains > Train Depot > Training Modules > ALP46 or ACS64). The ALP-46 one is a little buggy so might be wise to start with the ACS-64.