Roundabouts are slowing spreading in Lake County, Illinois:

The Lake County Division of Transportation (LCDOT) closed Darrell, Neville and Case roads in Wauconda to through traffic for 110 days to construct a roundabout and realign the intersections…
This is the ninth roundabout in the Lake County Division of Transportation system. The $8.1 million project is the first of three roundabouts to be built as part of the Darrell Road corridor improvement.
Suburbanites are used to traffic lights and stop signs. Adding roundabouts or diamond interchanges presents a new dimension to driving. The roundabout offers the possibility of a smoother journey – if there is not too much traffic – but requires a different level of attention as there are multiple yield points.
Suburbanites can come to like roundabouts with experience. But, local drivers will likely need some time to get used to them. I am curious to see how many roundabouts will eventually populate the suburbs. They are likely not possible in many places due to existing land uses. However, if they help move traffic, are safe, and people can drive through them, we will probably see more of them in the Chicago region.