Good Morning - Does anyone have information on the current data model for railroads - specifically freight (if that matters)? I need to build a railroad basemap but want to make sure that I am using the current data model. I am also interested in a data dictionary outlining the various attributes and values for the base map. I have historical and current experience with Dynamic Segmentation and have been leaning toward that form of implementation - any suggestions? I am very interested in what the major railroads have implemented.