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Path of least resistance
(slrpnk.net)
Desire paths Desire paths can be paths created as a consequence of erosion caused by human or animal foot-fall or traffic. The paths usually represent the shortest or most easily navigated routes between origins and destinations. https://en.wikipedia.org/wiki/Desire_path
Any medieval city builder that has transport networks I usually have my central hubs looking like I modeled them after a methed up Spidermans jizz after giving webslinging from his dick a try.
It starts just like this comic tho