AutoCAD Civil 3D General Discussion

AutoCAD Civil 3D General Discussion

3 Posts
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Registered: ‎05-03-2012
Post 1 of 4

Widenig Curves

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05-04-2012 08:49 AM

Hi All,


Im using Civil 3d 2012 and I couldnt find the function that I could offset the smooth curve aligment as shown on the attached pdf. I've looked thru the offset alignments but those linear, curve-cuve-reverse curve, curve-line curve doesn't help much. I would appreciate it if anyone might know the solution.



*Expert Elite*
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Registered: ‎09-05-2006
Post 2 of 4

Re: Widenig Curves

05-05-2012 05:16 AM in reply to: wilwil02

You will probably need a spiral.  It appears you probably have a "varying" radius.



*Expert Elite*
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Registered: ‎04-27-2005
Post 3 of 4

Re: Widenig Curves

05-05-2012 07:46 PM in reply to: wilwil02

When applying a widening through a curve it does not create a smooth transition. It segments it along the curve (I believe in 3 segments).


After a bit of testing, I've confirmed this:


The green line is the alignment and the white line is the offset alignment that transitions it's width from start to end of curve.

Brian Hailey
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Registered: ‎09-14-2006
Post 4 of 4

Re: Widenig Curves

10-26-2012 08:25 AM in reply to: BrianHailey

Has anyone figured out a way to dynamically increase the smoothness of the transition? Or an I stuck doing the transition manually to get it to look right? Seems like there should be a setting somewhere for this.

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