>>1346966This is usually only used to preserve frontage access to street corner buildings. And no, a hamburger intersection should only have one major road or one direction crossing the circular roadway (per its name; "throughabout" better suited to what your suggested is somewhat misleading ).
>but at least the green area would be usable1. A roundabout center island is either not supposed to be "used" by pedestrians, or is served by grade-seaparated crosswalks.
2. Just don't consider it in a single individual junction. Put it in a gridiron and make mini blocks.