The FHWA includes roundabouts on its list of Proven Safety Countermeasures for reducing fatalities on the road. By channeling drivers into a circular pattern, they minimize conflict points that allow vehicles to crash into one another. Their statistics show: An 82 percent reduction in fatal and injury accidents after transforming two-way stops into roundabouts. A 78 percent reduction in fatal and injury crashes after a roundabout transformation. Lower speeds and reduced conflict also create a better walking environment.