Thom:
I am out of town for the next week. Yes I have improvised a set of scripts which create an existing profile from a poly centerline on a DTM. A proposed 2D polygon profile can be drawn on the existing profile and converted to a proposed grade with vertical curves and stations. Another script creates a road section with pavement with, R/W width and berm slopes, etc. A subsequent script creates a set of site modifiers along the centerline on the DTM which have the properties of the road section and elevation of the proposed grade in the profile. The final script creates fences.
When the DTM is updated the proposed DTM appears as a roadway. The contours show the crown in the pavement, curb, berm and side slopes.
Please furnish me your Email address and I will furnish you one of my site plans containing the roadway scripts.
My email is greatdavidc@mac.com.
Please feel free to experiment with them. Although they have their limitations I feel that they are much better than the VW method of creating roadways with stake objects.
I am an engineer and surveyor and my programing abilities lack sophistication.
It is my hope that NNA could implement an enhanced version of this methodology in future versions of landmark.