"it's twisty little single track roads" There are a lot of single track roads - but there are also a lot of perfectly decent A class roads linking the main are

"it's twisty little single track roads" There are a lot of single track roads - but there are also a lot of perfectly decent A class roads linking the main areas. NB By single track I mean single track with passing places: https://en.wikipedia.org/wiki/Single-track_road https://en.wikipedia.org/wiki/Single-track_road