According to the wiki a mini_roundabout should be mapped with a node and not using a circular road, as in this case.
Any ideas how this case (wich occured quite often in the mapRoulette chalange) should be mapped?

Thank's, I think I've done this a few times...
Btw.: how would one map such a circular highway, which is neither a roundabout nor a turning_cycle. Simply map it as highway=residential/*? Oneway yes or no?

afaik I didn't map it as a roundabout but as a turning_cycle. That seems, according to Bing, correct in my eyes...