roads carry wheeled vehicles, trails are routes used by quadruped/critter carriers, and paths are the routes of bipedal/human cargo carriers.
Commercial transportation is a very rational and predictable activity governed by economics and physics. A column of burdened porters moved under the same imperatives as does an eighteen-wheeled truck. They and all other carriers seek the most efficient, fastest route from "A" to "B." Efficiency issues of importance to the operator of the carrier included:
fuel costs, and
fuel/energy expenditure.Questions drivers of men, animals, wagons, or trucks need to answer about route selection include: "Are there secure places at which to stop and repair gear along the way?", "Is there sufficient and cost effective game/fodder/diesel along our route to fuel the vehicle?" In…