Kurumi's Field Guide to Interchanges:Descriptions and diagrams of many types.
An VRML rendering of the 15-91 interchange, Corona California.: A 4-level stack with one loop. Requires a VRML plugin to view.
California Freeway Interchanges: Photographs from around the state.
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.
Highway Heaven Blog: Includes aerial photographs and commentary about certain features.
Highway-Intersections.net: Compendium of map images from various European countries.
Images of Britain - Spaghetti Junction: The M6 at the A38(M) in Birmingham.
Interchange of the Week: Detailed entries for locations in New York State, using official state aerial photography.
Interchanges: Page describing types found in the United Kingdom. Includes a link to the Bad Junctions page.
Interstate Interchange Browser: Uses Google Maps to locate every interchange on the U.S. Interstate system.
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.
The Parallel Flow Intersection: A specialized intersection. Page includes diagrams and research.
Unusual Interchanges: Diagrams and commentary of various ones in the East-Central U.S.
US Highway Interchange Browser: Covers Michigan and North Carolina.
WhereRoadsMeet: Contains aerial photographs and descriptions of unusual or complicated facilities in the United States.