circular alignments keeps the label station alignment.

[joantopo]

If you try to do an alignment with only one arc (center and Radius), and then rotate the circular alignment, the label stations of the alignments appears correctly, but if you save and re-open the drawing file, or you change the Radius, the last location of the label stations will be lost.

So you have to do 2 arcs (throwing 3 points) for a circular alignment.

However, the "automatic roundabout" create a circular alignment with one arc (center and radius) and the trouble is also present.

[joantopo]

http://forums.autodesk.com/t5/autocad-civil-3d-general/omg-i-can-t-change-the-start-station-in-the-c...

[peterfunkautodesk]

Due to a low strategic fit, technical feasibility, or the support of your peers, ideas with this status are not being considered for implementation at this time. Thank you for your contribution, every idea has merit. We always encourage you to rework and resubmit these ideas based on feedback received.

Regards,

Peter Funk

Sr. Product Manager

Autodesk, Inc.