Railroads History 209 Finance 103 Canals 74 Transportation 47 Freight 43 Rates 40 more ... Early works to 1850 35 Employees 33 Design and construction 28 Management 28 Surveying 26 Description and travel 24 Railroads and state 22 Commerce 19 Mergers 19 Right of way 18 Taxation 17 African Americans 15 Labor unions 15 Location 15 Locomotives 15 Employment 14 Coal mines and mining 11 Costs 11 Railroad law 11 Railroad stations 11 Coal 10 Coal trade 10 Roads 10 Sources 10 Appropriations and expenditures 9 Commuting traffic 9 Public works 9 Railroad companies 9 Strikes and lockouts 9 Electrification 8 Equipment and supplies 8 Histoire 8 Chemins de fer 7 less ...