Hitchhiking without a specific goal can be described as '''aimless trajectory''' hitchhiking.
It does not imply though, that this kind of hitchhiking has no goal in itself.
Question: What do you feel, after hitchhiking for a long time, not knowing where you are going, not knowing where to go back to, not having any money left, being on the road, hitch hiking, searching for people to share with.