Designs released by the ACT government show how they intend to reconstruct a key roundabout in Canberra's south, as they call for public feedback.

The ACT government has released detailed designs of light rail Stage 2B, which will travel through Barton to Woden.

Fly-over vision shows the reconstruction of the roundabout at the end of Yarra Glen into an intersection.

The plans will be exhibited until September 5, with the public encouraged to provide feedback.