I just got back from a trip from Bend, Oregon, and they use roundabouts extensively. Since I don't often see roundabouts, it got me wondering how efficient they are. Good timing on posting this topic.
Under light traffic conditions, there is a good chance a vehicle won't even have to stop which will preserve the momentum. I wonder if that had anything to do with me getting the second best MPG to date; 35mpg in my 205hp TSX. Of course, the constant elevation gain and loss was the biggest contributor to this excellent tank.
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