Autodesk CIVIL3D - CIVILDESIGNCOMP 2007 SLM CD Tutorials Manual page 303

4 In the Profile Layout Tools toolbar, ensure that Draw Tangents With
Curves is selected.
You are now ready to draw the layout profile by clicking in the drawing
at the proposed locations of PVIs. At each PVI, the application inserts a
curve. To be realistic, your line should follow the general profile of the
surface centerline. However, it can cut across steep hills and valleys to
outline a smoother road surface.
5 In the profile view, click the left side, near the centerline surface profile,
to start the layout profile.
6 Extend the line to the right and click at another location near the
centerline surface profile. Continue in this manner.
7 At the last point, right-click to end the profile. The layout profile is now
drawn and labeled.
Exercise 1: Creating a Layout Profile | 291