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The Social Significance of Transportation
Transportation as an Economic Function
Early Highway and Water Transportation in the United States
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75th Congress air lines air transport American applied Board Canal cargo carload cents chap charges Chicago Civil Aeronautics Act Civil Aeronautics Board classification classification yards coal common carrier competition Congress consolidation coordination cost discrimination distance economic equipment established extensive facilities factors federal freight rates freight service handling haul Hepburn Act highway important improvement increase industry inland Interstate Commerce Act Interstate Commerce Commission labor Lake load locomotives ment merchandise miles Mississippi River modes of transportation motor carriers motor truck movement Ohio Ohio River operation Pacific passenger Pennsylvania Pennsylvania Railroad percent petroleum pipe lines points ports problem production rail railroad Railway Railway Age rate level rate structure reduced regulation regulatory result River roads routes shipment shippers tariffs terminal territory tion trade traffic trains types United vehicle vessels water carriers waterways