I thought this Pedal Powered 4WD looked interesting as a potential Bug Out Vehicle if you didn't want to take well travelled roads.
It might be more energy expenditure than it's worth versus a good mountain bike, and geared for fun rather than work. Unfortunately I don't read German so...
TrailCart's Site If you go to
www.treehugger.com and flip through the recent articles you can find some information in english. I'd link it, but every time I post a link to that site it doesn't seem to work.