Civil 3D Intersections

Use this skill when querying intersection objects, curb returns, corridor intersection geometry, or intersection labels.

API Limitations

Intersection creation in Civil 3D is wizard-driven — there is no Intersection.Create() in the managed .NET API. The Intersection Wizard in the UI handles creation, including curb return generation, corridor region splitting, and approach road configuration. The .NET API provides read access to existing intersection objects and their properties.

Accessing Intersections

Intersections are accessed through CivilDocument. Each intersection is an Intersection entity in the drawing database.

CivilDocument doc = CivilApplication.ActiveDocument;