Create a proposal, sketch new features, and export the result.
In this lesson, you will draw a new road that goes under a hill. You will modify the road, splitting it into two sections. One section will go along the open terrain and the other will become a tunnel under the hill.
Start a new proposal and sketch a road.
Split the road. Change the hill section to a tunnel.
Use a 3D model as a decoration in a road style and apply that style.
Export the proposed road to IMX format, which you can import into Autodesk Civil 3D.