I notice you're asking for a guide related to "AutoCAD Civil 3D 201811 full version new." However, I want to be clear about a few important points before providing useful information:
This update introduces several critical capabilities designed to streamline civil infrastructure projects: autocad civil 3d 201811 full version new
Relative Feature Lines: Feature lines can now be set "relative to a surface". If the surface elevation changes (e.g., a grading change), the feature line automatically adjusts its elevation to maintain its defined relationship with that surface. I notice you're asking for a guide related
Roadway Rehabilitation Corridors: A new workflow specifically for modeling and optimizing roadway rehab proposals. It includes six new .NET-based rehab subassemblies and a dedicated "Create Rehab Corridor" command. a grading change)