An VRML rendering of the 15-91 interchange, Corona California.
A 4-level stack with one loop. Requires a VRML plugin to view.
Continuous Flow Intersections
Engineering firm page illustrating the connections in this feature. Includes illustrations and a video demonstration.
Highway Feature of the Week
Large archive of maps and descriptions of unusual or complicated facilities, primarily in the United States.
Interchange of the Week
Detailed entries for locations in New York State, using official state aerial photography.
Michigan Left Turn
Describes how this unusual intersection feature works, including history.
Museum of Dumb Highway Design
Aerial photos of and commentary on various interchanges which the author finds unusual or substandard.