I'll love to se a Onboard Train Guard feature in TSW! I guess, it would be implemented on the EAST COASTWAY route! I mean, as a guard, you see the timetable of the train! At a station, you open the doors, and provide a safe boarding! Also, that you have to check tickets would be nice! Aannndd... Don't forget about the buzzer, to signal the driver, that it's save to depart!