Roundabouts are the safest form of intersection control for motor vehicle occupants. Numerous studies have shown that, in general, fewer casualty crashes involving only motor vehicles occur at roundabouts than at intersections controlled by traffic signals, stop, or give way signs. However, injury crash rates for cyclists at roundabouts in Australasia are typically higher than at other intersection types, with the predominant crash type involving a circulating cyclist being struck by an entering motorist.
Tim Hughes, Axel Wilke, and Megan Fowler prepared a conference presentation for the Asia Pacific Cycle Congress that was presented by Tim. The link on the last slide refers to guidance in the CNG.
2017 Asia-Pacific Cycle Congress, Christchurch