Apparently, all roads do lead to Rome, at least in Europe, as documented by Benedikt Groß, Philipp Schmitt and Raphael Reimann roadstorome.moovellab.com/countries
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No. This is just an all-roads-leading-to-Rome exercice, a selection, you can do that for every city in the world with similar result.
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Isn't that obvious? Anyway, follow the link and you'll find exactly what you say
For every connected undirected graph (such as a road network), you can construct a spanning tree starting/rooted at any vertex (e.g. Rome). en.wikipedia.org/wiki/Spanning_
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