Data Talks

I was today years old when I learned that the UK's numbering system for A and B-Roads is based on zones and is not random.

(Explains why the two major ones near me are the A2 and A20).

Map credit: Roads [dot] org [dot] uk

More about how the zones work:… pic.twitter.com/IOs8K01XVt

— Brilliant Maps (@BrilliantMaps) February 19, 2026