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Show CHAPTER I INTRODUCTION An not a sufficient condition portation of its transportation system control itself for by is considered both the type of is said to be adequate transportation system limiting 1 an regional growth and permissive, economy can transportation system available over the level of its A close relationship and levels of economic United States, econom ic only some activity, Over United States has a so given efficiency far, Therefore, significant 1 so 3 0 (in 1947 prices) inter-city freight, mos t econom make them required With Trans- considerable number of years in the a four ton-miles of to development, to an area exercises a activity, although has been observed between volumes of transport lation results from the fact that transport is available and necessary advance every dollar of Gross National Product the movement of a 2 ic activities are Economic has meant This close possible only growth experrenced almost continuous increase of if in the transportation capacity lRoy J, Sampson, Railroad Shipments and Rates from the (Eugene, Oregon: Bureau of Business Research, University 1961), p 61. west co r re- Pacific North of Oregon, . D. C.: 2Wilfred Owen, Transportation Brookings Institution, 1959L p , and Economic 1800 Development (Washington, |
