Yes, I know, have you actually ridden on one of the ACA routes yet? The only thing that makes it a bike route is the fact that they publish maps with directions facilities on them. The only thing that takes the adventure away is knowing that there will be a cafe, camping, or whatever up ahead. They help to take the planning out of touring, which sometimes is a very fun part of it. Although if you just want to pick a route and go you can, and it will still be an amazing adventure.
Anyway, I was asking for some info on this bike route network that we have in Europe. Some countries are better than others, for example belgium and holland, but there is no, that i know of, international bike network here. As I said I know of maybe 3 routes that are international.
For me, I like to take a highlighter and outline a route taking small country lanes that will have hardly any traffic on them.