Intersection makes profile illegal

[zhangfeng.nttz]

When I created a intersection a locked pvi was created on the second road's profile, and the intersection was originly within the vectical cruve. However the locked pvi forced the  vectical cruve changed to two straight line, which made the profile illegal. How to fix that? 

[mathewkol]

This may depend on your design. Please attach your file.

I would guess it's either your choice of main road vs side road or the intersetion type; primary or peer.

[zhangfeng.nttz]

Attachments are drawing and the second road profile data.

[mathewkol]

Ok, I understand now.  When the profiles are locked, there needs to be a Vertical Point of Intersectoin (VPI).  I guess I've never done an intersection through a vertical curve.  For your design, it's lucky that your intersection is very close to one end of your curve.  Allow the locked VPI to be created and just create a new curve where there should be one.  It will be about 0.5m too short and i hope that doesn't break the bank (though there should be a way to fix that too.

This image shows the curve I added to your profile.  The lock VPI and my curve end point are very close to each other, though they can't be on exactly the same station.

[zhangfeng.nttz]

Thank you very much. And did you mean that there has not been complete solution for the problem in the current vision c3d?

[mathewkol]

None that I'm aware of.