I live in a part of the world which has remained isolated from the rest of the country until very recently. Asturias, in northern Spain, is so isolated that it is proudly boasted as the only part of Spain not to come under Moor control.
It is only in the last few decades that Asturias has been connected to other communities through EU funded communications construction. Even to this day, that work ploughs on unabated, often to the detriment of the beauty of the region.
Isolation in itself isn't a bad thing, so long as you avoid in-breeding, naturally. But it does throw up a few odd quirks which are unique to the people involved. Some people seem to think the French have webbed-feet, whilst it is true that on an island in Indonesia lived a Hobbit species as recently as 12000 years ago.
|Isolation under Franco led to Spain becoming one BIG carpark|
I have it on good authority - and have seen it myself - that drivers under instruction here are told by their instructor to always take the outside lane, no matter where you want to go, as it is 'complicated' to choose the correct lane. Once you leave Asturias, you'll find drivers able to deal with the complexities of roundabout lane choice without too much effort.
Isolation, it does throw up some oddities...
(PS. They are crap at designing road systems too...)