Well, it couldn't work in Qld. We have biiiiiig roundabouts up here as our road systems are quite sophisticated. Ones over and under freeways (these are large, multilane roads in both directions) and it is impossible to know whether a vehicle is going to turn off unless they indicate as you can't see which road they entered the roundabout from. Which is why many countries worldwide do the same as Queenslanders - Germany and Britain, for example.
