Hooking to Standard Rail Systems The freight cars will have standard rails and railroad couplers so that each can be switched to and from the BorderTransportationSystem to the legacy rail systems that lace the U.S.A.. The reason for individual freight units is to help eliminate railroad switching yards and the hours to days of delay each adds to the shipping time.  It may be reasonable to have a fuel driven motor in each unit so that each unit can fully bypass the switching yards and be computer directed directly to the final destination. {future goal} Index of ... Janney/MCB/ARA/AAR/APTA Coupler Track gauge - Standard gauge