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.
A 4-level stack with one loop. Requires a VRML plugin to view.
Descriptions and diagrams of many types.
Describes how this unusual intersection feature works, including history.
Aerial photos of and commentary on various interchanges which the author finds unusual or substandard.
Diagrams and commentary of various ones in the East-Central U.S.
Covers Michigan and North Carolina.
Includes aerial photographs and descriptions of unusual or complicated facilities in the United States.
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