To John Bobinyec and RyanS: The man is trying to advance some possible proposals. He is not holding himself out as an expert on equipment or scheduling. It is most assuredly not your "right" to shoot him down with your infantile and neo-acerbic wit. And kudos to WoodyinNYC. You answered...
Something that has had me wondering for some time; During the days of steam roundhouses were popular. It seemed every moderately sized town had one. Now a days rectangular engine sheds are built. I would think a roundhouse would be an economical method of storing and maintaining equipment...