How to change this taper, I am new in corridor modelling .

[Psychic00]

How to adjust / Change this taper or this automatic transition as default length of this taper is 25 and i have to change it or remove it . I tried manual tapering by "edit corridor transitioning" it done the job but existing taper remains same and didn't gave expected or desired result.

[Psychic00]

Video isn't accessible/playable. Only video icon appears in reply.

[Jeew-m]

Civil 3D Offset Alignments - Set Widening Defaults (youtube.com)

[nkiakas]

Hi @Psychic00 

What do you have in your file?

1.Corridor transition prepared by you? or

2.Corridor without transition with offset target targeting to offset alignment(s) with widening(s)?

Can you share your file?

Regards

[Psychic00]

I've simply created two assemblies and made corridor by defining each assembly station range and this is the result of automatic transitioning from 1st to 2nd assembly ,I've attached dwg for ur ref.

[chriscowgill7373]

Based on the drawing, you are transitioning from one assembly to a completely different assembly in that location.  Civil 3D doesn't handle transitions from one assembly to another that is different very well at all.  You could fake it into working for you though.

The first question that must be asked is, what version of Civil 3D are you using?  If you are in 2023.2 or newer, Corridor Transitions would help, otherwise, you're stuck with offset alignments and widenings to accomplish a transition. 

I cant modify your corridor at my end, because I don't have access to your subassemblies, but, if you really had to change your assembly at 1+000, you could try using a transition that takes the basic lane from a width of 0 at 1+000 to the desired width at the required location.   You would need to somehow account for the width of your guardrail in your assembly.  If you are using transitions, you could do this, but if you are using widenings, the Basic lane will not work, as you cannot assign targets to it.