A Roundabout at 48th and State? Oh my!

So the news broke late last week that officials are looking at installing a "roundabout" at 48th and State to alleviate traffic congestion at that intersection in Quincy. Roundabouts are more prevalent on the east coast than in the midwest and are quite effective in streamlining traffic as long as people stay in their proper lane.

Now there lies the problem I see with this proposal. Quincy installed two left hand turn lanes at 24th and Broadway as well as 36th and Broadway years ago and people still don't know how to use them properly. A roundabout at 48th and State is a demolition derby waiting to happen.

What do you propose they do?