zimm
Expedition Leader
It is certainly not the first choice for adventure travel, but it has been used for it.
back when that was new, there were fewer vehicles in out of the way places... and hence fewer ruts. also the ruts are determined by the locals "biggest common vehicle", and transport in 3rd wold nations has gotten bigger with the bigger mogs and Mans.
i'll bet car travel in the 60's and 70's was much easier and common, where there was an actual unimproved road.