I don't think that much is shared between streets and roads. Roads need all the details about curvature in the article so car traffic flows efficiently. Compare that to the beautiful but narrow streets of a Mediterranean town. Buildings are rarely parallel, angles are odd, but everything is on a human scale, and it just feels good to walk around.
If we have a 9 km mountain on an otherwise spherical planet (r=6371 km), the horizon would be 339 km away. With two mountains having a sightline between eachother the maximum theorethical distance doubles to 678 km.
Be careful what you believe from Balázs Orbán, as a Hungarian I can say he is mostly concerned to come up with a ideology to explain whatever Viktor Orbán is doing and not building a consistent model of world politics that drives actions.