The City of Bismarck has been constructing roundabouts at certain intersections around town. Roundabouts are becoming more common here and in other areas and will continue to be a good option in areas where it is feasible.
Advantages of roundabouts vs traditional intersections:
They greatly reduce the frequency and severity of intersection related accidents, by forcing traffic to slow down, thereby reducing including high speed head-on and perpendicular crashes
They are much safer for pedestrians because they only need to cross one direction of traffic at a time and they typically have a shorter distance and center island for pedestrians to stand while waiting cross the other lane of traffic.
They require far less maintenance of expensive equipment as compare to a traditional signalized intersection.