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Top: Recreation: Roads_and_Highways: Interchanges
Interchanges are complex intersections between two or more roads involving connector ramps. The main roadways in interchanges are usually grade-separated (use of overpasses), though some unusual examples include at-grade intersections where there usually are grade separations.
Roundabouts are specially-engineered traffic circles. While the name is British, they also exist in North America.
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