ABSTRACT
In transportation of people or goods, carrying them over the shortest possible distance enables shorter transportation time and lower transportation cost. Typically, the cost and energy required for transportation increase with distance. At the same time, transporting a particular item in a certain quantity often results in labor savings. Mass transportation systems can achieve significant savings in energy and cost of transportation. If a certain quantity of people or goods is carried at one time, the total sum of cost and energy can be reduced, even with a certain number of transportation detours.
