roundabout at our freeway exit and a Pilot station on one side. The semi traffic doesn't work well with the roundabout. There is an accident, tipped over trailer, or stuck semi every week. The traffic backs up to the freeway because the semi trucks are blocking both lanes as they try to merge into 40 mph traffic. Then they have to use both lanes to stay in the road on the turns.

Then there are the 10 roundabouts in a row between Vegas and Phoenix. That is about the dumbest use of tax payer money ever. The side roads merging into it have zero traffic.