Monomobile: Electric Rail Car
- Proposed lightweight, dual mode, hybrid 4 wheel electric road and suspended monorail cars, drive on and off roads and atop overhead tracks as needed.
- http://home.fuse.net/ard/

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/

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/