Transportation, Automotive Social aspects 6 Automobiles 5 History 5 Transportation 3 Automobile industry and trade 2 Environmental aspects 2 mer ... Government policy 2 Roads 2 Urban transportation 2 Alternative fuel vehicles 1 Architecture and society 1 Automobile ownership 1 Autonomy (Philosophy) 1 City planning 1 Cost of operation 1 Cultural landscapes 1 Environmental degradation 1 Fuel consumption 1 Highway departments 1 Land use 1 Local transit 1 Manners and customs 1 Motor fuels 1 Motor vehicles 1 Movement (Philosophy) 1 Railroads 1 Regionalism 1 Social life and customs 1 Street-railroads 1 mindre ...