You can create a surface from a corridor.
Because corridor surfaces are an output of a corridor model, they remain dynamically linked to the corridor. Any changes to the corridor definition are reflected in the surface definitions. You can also create a detached surface from a corridor surface.
You can use the Surfaces tab of the Corridor Properties dialog box to create corridor surfaces. Clicking Corridor Surfaces 
on the Corridors contextual ribbon tab also displays the dialog box that lets you create a corridor surface.
When you create a corridor surface, it is added to the Surfaces collection on the Toolspace Prospector tab with the corridor surface icon . You can work with a corridor surface the same way you do with any surface in the Surfaces collection, including changing its style, adding labels to it, and using it for surface analysis. The following features and behaviors are unique to corridor surfaces:
- When you select a corridor surface, only the surface is selected. The corridor it is based on is not selected.
- When you change the surface style of a corridor surface using its surface properties, the style is also changed on the corridor properties Surfaces tab.
- When a corridor is rebuilt, corridor surfaces are updated to reflect any changes in the corridor, and then any edits are applied to the corridor model.
- The corridor from which the surface was taken is listed in the surface properties definition.
When creating corridor surfaces, sometimes you may need to correct overhanging surfaces in the corridor. Overhanging surfaces can be corrected on the Surfaces tab, Corridor Properties dialog box.
