[jaza]

Here in New South Wales, Australia, we switched to European-style alphanumeric route numbers about 10 years ago. You can still see signs with the old-style route numbers (just numeric, and inside either a shield symbol or a hexagon symbol) in more than a handful of places around Sydney.

If you look hard enough (mainly confined to secondary rural roads these days), you can also still find signs with distances in miles. Australia switched to kilometres about 50 years ago.

So, yes, updating all the docs is hard!