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{{For|transportation network mathematical graph theory|Flow network}}
{{Network Science}}
A '''transport network''', or '''transportation network''', is a [[spatial network | network or graph]] in geographic space, describing an infrastructure that permits and constrains movement or flow.<ref name="Bart">{{Cite journal|arxiv=1010.0302|last1=Barthelemy|first1=Marc|title=Spatial Networks|journal=Physics Reports|volume=499|issue=1–3|pages=1–101|year=2010|doi=10.1016/j.physrep.2010.11.002|bibcode=2011PhR...499....1B|s2cid=4627021}}</ref>
Examples include but are not limited to [[road network]]s, [[railways]], [[Airway (aviation)|air routes]], [[Pipeline transport|pipelines]], [[Navigable aqueduct|aqueducts]], and [[power lines]]. The digital representation of these networks, and the methods for their analysis, is a core part of [[spatial analysis]], [[geographic information system]]s, [[Public utility|public utilities]], and [[transport engineering]]. Network analysis is an application of the theories and algorithms of [[Graph theory]] and is a form of [[proximity analysis]].
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