Descriptions and diagrams of many types.

Diagrams of unusual interchanges in North Carolina.

A 4-level stack with one loop. Requires a VRML plugin to view.

Photographs from around the state.

Aerial photos of and commentary on various interchanges which the author finds unusual or substandard.

Professional paper on this part-at-grade, part-grade-separated intersection.

Detailed entries for locations in New York State, using official state aerial photography.

Describes how this unusual intersection feature works, including history.

Diagrams and commentary of various ones in the East-Central U.S.

Large archive of maps and descriptions of unusual or complicated facilities, primarily in the United States.

Contains aerial photographs and descriptions of unusual or complicated facilities in the United States.

The M6 at the A38(M) in Birmingham.

Engineering firm page illustrating the connections in this feature. Includes illustrations and a video demonstration.

Page describing types found in the United Kingdom. Includes a link to the Bad Junctions page.