take the edge off CIVIL 3D

Very Good Point - it's got me thinking...:)

cheers,
SeanT

Great post but be wary when using this method to construct slopes between adjacent roadways. Since you are only calculating from one roadway the slope point at the bottom of the ditch will not hinge and turn perpendicular to the other roadway for an accurate slope. This leads to the slopes actually being 4:1 on the primary road yet a little less on the secondary road due to the slopes all being perpendicular to primary rather than hinging and being perpendicular to both roads. Building a suface on your corridor and measuring contours will allow you to see the error graphically.

if my geometry not like a box it is oval and have three radius haow can ı create section

Future sounds good. Many interesting ideas, but I think the idea that it will go to help is to find a solution to faster execution of works in the field.
Developing software that can retrieve project data I think sounds good.
Design is moving fast enough, the execution is harder.

Succeses!

Thanks Alistair,
I've heard nothing recently about the TAB provider but was told that as it is a very 'flat' file format, something like an intermediate database may be necessary?
The OSGEO discussion groups may have something on this - I'll ask a friend who is involved in all this where to start looking.
(this will be next week - holidays in Oz still, I'm happy to report!:))
cheers,
SeanT