In Pathway, characters travel by a jeep that needs fuel to function. You can purchase fuel from a merchant or find it during random events (you don't have to move near enemy bases; fuel can also be found in vaults and crypts!). Moving from one point to another cost you one unit of fuel ($125).
If you run out of fuel, you can stop your current expedition - you won't lose any progress (collected valuables or gained experience). The characters you had during this expedition can be send out on another. Second option: you can travel on foot if you are near the destination or you simply like the thrill of danger. This method of traveling works in the same way as when you are driving a jeep. However, each move on the map depletes health points of your characters (around 15-20 health points per move).