Editing Built environment (section)

=== Public infrastructure ===
[[Public infrastructure]] covers a variety of things like roads, highways, pedestrian circulation, public transportation, and parks.

Roads and highways are an important feature of the built environment that enable vehicles to access a wide range of urban and non urban spaces. They are often compared to the arteries and veins of a [[cardiovascular system]] insofar as they circulate people and materials throughout a city similar to how arteries and veins circulate molecules like oxygen, glucose, and hormones between the heart and the cells, which is required for cell survival and optimal functioning.  .<ref name="Samaniego 2008 21–39">{{Cite journal |last1=Samaniego |first1=Horacio |last2=Moses |first2=Melanie E. |date=2008 |title=Cities as organisms: Allometric scaling of urban road networks |journal=Journal of Transport and Land Use |volume=1 |issue=1 |pages=21–39 |doi=10.5198/jtlu.v1i1.29 |issn=1938-7849 |jstor=26201607|doi-access=free |hdl=11299/170551 |hdl-access=free }}</ref> Pedestrian circulation is vital for the walkability of a city and general access on a human scale. The quality of sidewalks and walkways have an impact on safety and accessibility for those using these spaces. [[Public transportation]] is essential in urban areas, particularly in cities and areas that have a diverse population and income range.