Local transit Transportation 16 History 11 Subways 10 Railroads, Elevated 7 Street-railroads 7 Urban transportation 7 more ... Central business districts 6 Streets 5 Transit systems 5 Commuters 4 Railroads 4 Street railroads 4 African Americans 3 Construction 3 Employment 3 Fares 3 Finance 3 Railroad employees 3 Street railroad stations 3 Athletes 2 Bus lines 2 City traffic 2 Civil rights 2 Communication and traffic 2 Commuting traffic 2 Pickets 2 Piers & wharves 2 Power plants 2 Some 2 Strikes 2 Subway stations 2 Traffic engineering 2 Women 2 Aeronautics 1 Bridges 1 Bus stops 1 Buses 1 Card games 1 Crowds 1 less ...