My suggestion is that you would add like a small fiqure to timetable that shows the amount of cars that you will have. This would be cool because for example in London Commuter I sometime would want to drive a 12 car Gatwick Express train and it will take a lot more time for players to go and find a service which has 12 cars. You already have a system to know how many cars because in game Esc-menu there is the amount of cars so I think this should not be a very big of deal to make.
