Corridor not following centre alignment help

[wol000]

Hi Folks,

New to civil 3d. I'm having an issue with my corridor not following my alignment and tieing into an joining road. There is an offset alignment line for the adjoining road, but no matter what I target I get a bump at the crown. The longsection looks fine and connected perfectly, any help would be greatly appreciated

[Anonymous]

Hi,

Can you share that C3D file ?

[wol000]

Hi Gurulal,

the file is to large to post, thanks for getting back to me. I've looked at it a bit more. The assembly is targeting the existing ground at a certain point along my alignment, If I add the crown and lane to my corridor surface, it fixes one side only, I can throw up a few pictures

[Anonymous]

Hi wol,
Did you try to match proposed profile elevation with adjoining road elevation, i think that's the problem.

[wol000]

Yeah, at that point on the long section were they cross the level is good. When I flip the model into iso view and I.d the point it’s 60mm higher in the corridor 

[Anonymous]

If possible Please attach the file.
or send me here :- gurulalsingh80@gmail.com

[JRitner]

I typically run the corridor for the perpendicular road up to the curb returns and stop it. Then I create a separate curb return assembly and run it along the feature line or curb return alignment, as the case may be, targeting the CL & Offset alignments and profiles of the intersecting roads. See pics below...

Connected curb return alignments

Bottom assembly is for returns

Intersecting corridor definitions

Set alignments as width targets

Set FG Profiles as elevation targets

Completed return corridors

Finished Intersection

As long as you're vigilant about naming all your alignments, profiles, assemblies and corridors well, the process is pretty painless once you get the hang of it.

Hope that helps! Good luck!

[wol000]

That’s a good process and the way to go, when I build back like that targeting my road centre alignment and Offset alignment edge, the tin starts to zig zag and attached to existing alignment. I can’t even fudge it, by swapping edges and points etc to get round it, I’m going to rebuild it. I have a very sharp turn / radius just before the intersection, which is causing regions to overlap and I believe this has caused the problem 

[wol000]

I figured it out. My corridor has two separate assemblies, one for each side with the alignment added twice, one for left and the other for the right. The vertical baseline on the right was not set to the correct vertical baseline, so it was slightly off. Very silly,