Recent trends in public transportation systems in the United States has been to invest in and expand subways and light rail systems in the largest cities..
shift public money for education to investment in railroads.
encourage carpools and the creation of carpool lanes on highways.
place less restriction on Uber and Lyft operators.
continue improving highways, bridges, and airports.

Urban growth invariably feeds increased commercialization and industrialization. it requires continually expanding land areas. when urbanization rates are high, and countries do not have the institutional and managerial capacities or economic wherewithal to manage such rapid growths, they exert intense pressure on the types and nature of the resulting settlements. they contribute to the development of overcrowded slums and shanty towns without adequate essential services and necessary infrastructure.-by asit k. biswas and cecilia tortajada