AutoCAD Civil 3D

[#1]

Dear all, 

I've used the OverlayWidenMatchSlope1 subassembly to widen a new travel lane using the existing carriageway crossfall  then I try to create another lane using the same assemble following the same slope but the insert point always starts on the existing ground rather the new levels from the first new widening lane. Please help!

Regards

[#2]

You have to make an fg surface from the first run then tell the second run to use the fg surface in the corridor parameters

[#3]

Let me ask you, if I may, you ok with you widen eop not having an engineered profile? That is following the irregularities of the eg surface?

[#4]

I use this method for widening, as long as the existing surface is reasonably smooth and the cross section doesn't include a curb.