There is a point in the rules (
2.5 {S}), that is allowing the train with ph (passenger stop) to go earlier, if both dispatchers and a driver will give permission to do that. Of course, it makes sense when you're close to finishing your timetable and have 40ph, but players shouldn't use this rule really often. No one wants their train go depart before time
If the timetable has long stops, try to ask for another one. This rule doesn't apply for pt (technical stops) or pm (shunting work), in these cases you can go earlier with no problems.
~KMS
