The purpose of this 2006 research report published by the NZ Transport Agency and authored by D Campbell, I Jurisich and R Dunn for GHD Limited and the University of Auckland was to come up with an on-road roundabout design that is both safe as well as attractive to cyclists. Ideally, this design will have benefits to other users as well.
The result of this work is the cyclist roundabout, or C-roundabout, a new concept in roundabout design.

Multi-lane roundabouts are typically viewed by cyclists as one of the most hazardous types of intersections to negotiate and police crash statistics bear this out. For the purposes of this research, the definition of a ‘multi-lane roundabout’ is that of a roundabout that accommodates more than one lane of traffic on the circulating carriageway.
In 2003, scheme investigators in Auckland, New Zealand discovered that there is no adequate on-road design available enabling cyclists to ride through roundabouts, and this seems to be a deficiency in design standards.