alignment+super elevation diagram problems

[Anonymous]

Hello Guys!

I have a problem.

I made my road alignment and at the beginning and at the end. Because normal circles do not end where i want, i replaced them with arc and added to the original alignment.(I tried to break circles vertexs, but it does not work). Speed tests are ok and satisfy road parameters. 

When I made superelevation diagrams, the arcs are not recognized as curves but as spirals. How can I solve this?

Thanks in advance.

Regards

[Jeew-m]

Dear Friend,

What is design guideline you are following. Are the curves satisfy the minimum radius/length requirements for your design speed. It seems like the some curves are shorter than the spirals. If it is possible to upload the dwg that is more convenient.

Thanks

[Anonymous]

The first spiral do not satisfy because I set as speed 60 Km/h.   But, because it is beginning of the road and vehicles can reach 30 Km/h. By setting this it satisfy.

Here the upload

[Jeew-m · Accepted solution]

Your alignment starts with a curve. You also have a design check file and superelevation guideline in your template. If the superelevation file does not describe how to draw alignment when it starts with a curve Civil 3D will get lost how to start it. I hope that's what has happened here.

Go to superelevation editor and manually adjust the superelevation to your desired value at start.

https://knowledge.autodesk.com/support/autocad-civil-3d/learn-explore/caas/CloudHelp/cloudhelp/2017/...

Thanks

Note

Usually Roads are designed for fix design speed for a certain section. It is bit odd to have 60,61,64 Km/h speed sections at near intervals. Instead you might select a fix speed such as 60km/h for whole section.