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In the second half of the 20th century, urban planners gradually shifted their focus to individualism and diversity in urban centers.<ref>{{Cite web|last=Routley|first=Nick|date=2018-01-20|title=The Evolution of Urban Planning|url=https://www.visualcapitalist.com/evolution-urban-planning/|access-date=2020-09-25|website=Visual Capitalist|language=en-US}}</ref> | In the second half of the 20th century, urban planners gradually shifted their focus to individualism and diversity in urban centers.<ref>{{Cite web|last=Routley|first=Nick|date=2018-01-20|title=The Evolution of Urban Planning|url=https://www.visualcapitalist.com/evolution-urban-planning/|access-date=2020-09-25|website=Visual Capitalist|language=en-US}}</ref> | ||
== 21st century practices == | |||
Urban planners studying the effects of increasing congestion in urban areas began to address the externalities, the negative impacts caused by [[induced demand]] from larger highway systems in western countries such as in the United States. The [[United Nations Department of Economic and Social Affairs]] predicted in 2018 that around 2.5 billion more people occupy urban areas by 2050 according to population elements of global migration. New planning theories have adopted non-traditional concepts such as [[Blue Zone]]s and [[Innovation district|Innovation Districts]] to incorporate geographic areas within the city that allow for novel business development and the prioritization of infrastructure that would assist with improving the quality of life of citizens by extending their potential lifespan. | |||
Planning practices have incorporated policy changes to help address anthropocentric global [[climate change]]. London began to charge a congestion charge for cars trying to access already crowded places in the city.<ref>{{Cite web |title=Congestion Charge (Official)|url=https://www.tfl.gov.uk/modes/driving/congestion-charge|access-date=2020-09-25|website=Transport for London }}</ref> Cities are also prioritising public transit and cycling by adopting such policies. |