1.Compare and contrast the transportation principles of economy of scale and economy of distance. Illustrate how they combine to create efficient transportation.
3.Railroads have the largest percentage of intercity freight ton-miles, but motor carriers have the largest revenue. How do you explain this relationship?
4.The five basic modes of transportation have been available for well over 50 years. Is this the way it will always be, or can you identify a sixth mode that may become economically feasible in the foreseeable future?