In 112.1 you can edit already created line as much as you want, so it affect on every vehicle which are set to go that line.
But in 112.3 I couldnt find the way how to change line marks or delete actually line. So you need to go in vehcile and change the line marks over there. It will only affect on that vehicle. Is this known change or human error in developing. This problem caused me to choose 112.1.
Maicii,
when you change line (in line management dialogue), vehicles change line too after passing the first next station in order (or after passing the first station of all order) - if that station is not changed.
Only one case when you need to change vehicle's order is, if its next stop is in changed station. Then it cannot go futher.
It was in different place than 112.1 ;D thank you