You can export corridor surfaces as Autodesk Civil 3D surface objects. Exported surfaces are no longer part of the corridor. They will not react to changes to the underlying corridor object.
The exported surface is comprised of breaklines based on how the corridor surface was defined (links or feature lines).
The Create Corridor Surfaces dialog box is displayed. View all the available corridor surfaces for the selected corridor.
The surface(s) is created and available in the Surfaces collection in the ToolspaceProspector tree. The surfaces are displayed in accordance to the surface style set in the Export Corridor Surfaces dialog box.