Whoever did the analysis in the presentation posted to the DOT page on this appears to have thought, "Oh, most of the accidents occur at the traffic circle! We better break that up!" Not realizing the accidents come from the roundabout being a chokepoint of high volume flow and all they've managed to do is increase friction with stoplights, which will increase accidents, and that's according to... https://www.dot.ri.gov/Safety/roundabout_safety.php