Railroads History 367 Roads 239 Canals 158 Finance 96 Transportation 85 Commuting traffic 81 more ... Express highways 65 Coal mines and mining 49 Freight 49 Administrative and political divisions 38 Railroad stations 36 Passenger traffic 34 Local transit 31 Lumbering 31 Railroad law 31 Railroads and state 31 Histoire 30 Design and construction 27 Employees 27 Rates 27 Appropriations and expenditures 25 Coal trade 25 Right of way 25 Street-railroads 25 Early works to 1850 24 Surveying 24 Planning 23 Chemins de fer 22 Mergers 22 less ...