Maybe this one? http://forums.sketchucation.com/viewtopic.php?t=40627
(It won't save you all the manual work but can help with the most annoying parts)

You should be able to use the Drape function in the Sandbox Tools to apply your lines to the Google Earth terrain.

Once the lines are draped you can modify the terrain to make it more accurate according to your survey.

Curbs and planters should be modeled, not sculpted out of the terrain.

Others here will have ideas I am sure.

%(#800080)[Hi G;

Yes, I do believe there's some mystery geometry in my specific model that causes the freeze. My workaround has been to do the SAVEAS, and then in the copied file delete, not hide, absoulutely everything that wont' appear in the 2d section cut. It's a bit of a bear, but at least I don't have to redraw in ACAD, right?

At the least, the Forum has helped me confirm that I'm not missing any basic knowledge, and the various feedbacks have led to my workaround.

much appreesh!
N]