Well they could be a regular crew during the Night but the end the trip with a Lay Up!.. That one train probably been on the road all night and its getting put into the yard to be serviced. A lot of Trains rotate!. Like one of my Trips, i report to Mosholu Tower, But Instead of going to Mosh Yard , I go to Concourse Yard to get My train, Then i go Straight into Service from the Yard to Kingsbridge. But Ill end my day at Woodlawn! all schedules are different