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highway to 6-lane roundabout

a Setup I often use to go from a highway to 6 lanes. It's made so that the cars going to the 6-lane have to move to the inner cicle of the roundabout, and the ones leaving move to the outer circle. It's good for mediocre traffic, and hardly has traffic jams, they usually appear behind it since the flow of traffic stays steady.

Do note that it is only an exit from the highway. You can make it an entrance by changing the direction of the on-ramps.