Dual Mode

RUF: Rapid Urban Flexible - Proposed dual mode, hybrid 4 wheel road and monorail vehicles, car and bus, drive on and off roads and atop overhead tracks as needed.
www.ruf.dk/

TriTrack - Proposed lightweight, dual mode, hybrid 3 wheel electric car/monorail: drives on and off roads and overhead tracks as needed. Road speed limited to non-lethal speed. Fiberglass body.
www.tritrack.net/