What happens when a crew that is supposed to go to Dyre Avenue, instead is put on a train that goes to Nereid Avenue? And what if that rerouted crew is scheduled to make another run from Dyre? All of the crews that are scheduled to go to Nereid Avenue are finishing crews, meaning, their work day is done once that train is in the yard. Often, however, crews do not make the trips they are scheduled to make, but make a trip either earlier or later than scheduled. Been there, done that.