Hi Dulini,
I found this older thread on accident. I typically find questions posted this forum pretty quickly:
https://community.esri.com/thread/118424#450222
Generally roundabouts are a weakness in the rule. The issue usually comes with the UV space changes a roundabout creates near the intersection. In addition, the Complete Street Rule and to some extent CE roundabout shapes generally do not handle the following very well:
1. Non-uniform width/high curb radii shapes/approaches
2. Pedestrian islands (not a supported feature)
If you still want to talk about this let me know. I realize it is a little late now.
David
David Wasserman, AICP