The Interline Service Agreement (ISA) Repository enables any railroad to enter into an interchange agreement with a partner railroad. The ISA Repository helps railroads in and around major rail gateways operate more effectively by improving their planning and communication with their partners, and by providing convenient access to essential information about interchange agreements. The repository stores critical details about the railroads' interchange activities—including frequency, times, length of trains, and interchange locations—helping to ensure that interchange events occur as planned.