Part of the problem in modeling is to also model the tens of thousands of humans interacting with the new schedule. Changing the train schedule also changes the

Part of the problem in modeling is to also model the tens of thousands of humans interacting with the new schedule. Changing the train schedule also changes their schedules. Hence, each time a schedule changes there is an uptick of accidents, disruptions, missed trains, overcrowding, etc until all adjust to this new timetable.