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SIGNIFICANT HIGHWAY DEVELOPMENT
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8T tT Allegheny Airlines Allegheny River Altoona billion ton-miles CENSUS OF TRANSPORTATION coal products commercial Conn Corporation Dravo Corporation daoxa s^ospoad Days Days Days destination Dravo Corporation Dravo Eastern Airlines freight forwarder Harrisburg highway inland waterways Interstate Interstate Commerce Commission Jersey Johnstown Lake Central Airlines Lakes ports major trunk line mergers metal products Mid-Atlantic Middle Atlantic Region miles million tons Mohawk Airlines Monongahela River motor carrier service movements national total OT^UBX^V Pennsylvania Railroad petroleum and coal Philadelphia Pittsburgh Production Area l2 puB Xbxo Public warehousing Railroad Company railroads serving Pennsylvania raw materials Reading Railroad saxxddss puB scheduled Scranton shipments originated shippers Shortway small shipments sqospojd T'T t'T T'TT TPPTW traffic Trans World Airlines transit-times trunk line railroads TT TT TT TT XT TT'T TTTT United Airlines warehouse Western Maryland Railroad Western Pennsylvania Xaxbp XT OT XT XT XT