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.
http://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.
http://www.tritrack.net/
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