I am programming ultimate parametric subassemblies for all your Civil 3D projects. Can be used for almost all possible variations within your design like: - train gauges with cant - tunneling (TBM and/or rectangular) - ramps - walls - excavation structures Tell me your project needs and within the next hour I can tell you if the programming is possible or not. I can also support in getting all data into Revit as mass families, of course georeferenced. Below my offer for you: - All corridors as real 3D models into revit - shape codes as element family (element based design) - BIM ready models - splitting into variable blocks according project needs - creating gaps in between blocks - IFC 4.x mapping according project needs for more details please contact me, I can tell you my profession in details. After that you can decide if you want to work with me or not.