Dont know about the possible layout if this got implemented, but I would suggest adding details like number of cars and length to the timetable chart, just so one would see what kind of consist they are about to drive... sometimes you can guess by experience, but sometimes like me you are in mood for a certain consist and such things, and it would be nice to know those before having the service loaded up (which can take a bit longer if you dont have the game on an SSD... like I do now, my SSD died a week or so ago RIP)
that shows, after the service is loaded... my suggestion would be to show such details in the timetable chart menu... lets say I want to drive a 2x 8 ICE3 consist on Kassel Wurzburg, cos that one has higher chance of getting some 280 kmh sections...
