Its great when I can have some time with some developers as some good ideas come together.
The guys at Savoy Computing and TRL with Arcady, put together a very cool 2D roundabout tool in recent months.
After spending some time with them, we now have it Civil 3D enabled where it is pushing out Civil 3D Alignment objects for the channels, ICD and even those 2/3 crownlines.
With a little conceptual design surface underneath, we can now make a full corridor model linked to the roundabout design and traffic analysis and get real time updates. Once decided on the layout a few tweaks to the profiles and you have it all fully detailed and ready to build!
Enjoy this video that Savoy has put together.