At first glance i thought this was in Australia, because of your moniker, so I was trying to figure out which way the traffic went. But you're here in NYC. Anyway, there are a few traffic circles here in Brooklyn, most around Prospect Park, but the one in the picture looks much worse than these somehow. Park Circle has bike lanes all around it now, and Bartel Prichard Square is small. I avoid Grand Army Plaza generally, except last week they were paving it and it was completely closed to traffic so I rode straight through. All the traffic was routed onto my usual bike street.