As we grapple with the U Turn issues at this intersection and have been advised we can do no more from an engineering point of view, which means we must rely on SAPOL to monitor U Turns at this intersection, we find this suggestion being mooted at North Terrace.

 http://www.adelaidenow.com.au/news/south-australia/major-u-turn-on-road-rules-will-reduce-toll/story-e6frea83-1226509472743

Interesting reading.