Photographer Ken Ohyama has a magnificent Flickr photoset of highway interchanges in Japan (78 photos).

Hakozaki Junction, by Ken Ohyama --
Hakozaki Junction

Hokko Junction, by Ken Ohyama --
Hokko Junction

Hokko Junction, by Ken Ohyama --
Hokko Junction

Tempozan Junction, by Ken Ohyama --
Tempozan Junction

Daikoku Junction, by Ken Ohyama --
Daikoku Junction

Kawaguchi Junction, by Ken Ohyama --
Kawaguchi Junction

He also has a book of these photographs.