It appears we still have the same issue of being in restricted mode whilst on high speed line? That's not right is it? EDIT - I've just realised I clipped this pic too much, this is in a section where line speed is 125mph and there are no other trains in front of me on map.
https://forums.dovetailgames.com/posts/489691/ https://forums.dovetailgames.com/posts/505878/ These might be relevant to you.