How does one design a road prism template which in a cut condition, the slopes go down to daylight rather than up. There seems to be a assumption made by the software that one would never want a cutslope to angle downward through existing ground to daylight. This is exactly what I want, but I cannot see how to achieve it in Carlson Civil.
I've tried various ditch options, and negative slopes, etc., but I haven't hit upon the right technique. It should be straightforward, and I suspect that I am missing something quite simple. Any help would be appreciated! Thanks.
I am using Carlson Civil Suite 2009 in AutoCAD Architecture 2009 (ACA09) on a stable and powerful XP Pro (SP2) machine. (By the way, the Carlson software seems to run just fine in ACA09.)
--- Evan