Safe System Solutions completed an independent evaluation of the effectiveness of this compact urban roundabout in Mildura. It showed a 19.20km/h reduction of entry speed (average), with new 85th percentile speed of entering vehicles of 19.26km/h (and 99th percentile = 26.99km/h). 
Other things to note: the roundabout was delivered for under $50,000 and the construction time was only five days. 

See the details in our evaluation report that can be downloaded here: