Intersection Knot Necktie. Inspired by the complex on-ramp junctions on the German Autobahn, a diagram of a "cloverstack" highway interchange has been repeated kaleidoscopically to form a knot-like, lattice pattern or quatrefoil. Perfect for architects, engineers, urban planners or drivers who are tied-up in traffic too often. Also a new favorite for brides and grooms who identify with the knot symbolism. Original illustration.