There are roundabouts in England that are just a painted white circle in the middle of the intersection. Those work once the population knows how to handle roun

There are roundabouts in England that are just a painted white circle in the middle of the intersection. Those work once the population knows how to handle roundabouts though. In the US, people barely comprehend regular roundabouts and in my town the larger one actually has traffic lights controlling the roundabout. So all the cost of the roundabout + all the cost of lights but none of the traffic flow benefits.