While being at work, far from where I can obtain a single GPS track, the Brazilian community have adopted the project TIGER 250, and adjusted it for Brazilian conditions. The project was named Brasil 250 Cidades which means Brazil 250 Cities. One of the important elements with the project is a distance table with the route length between key Brazilian cities, with color codes identifying their status (based on calculated length, not reality).
So what have this to do with me? Simple, as I cannot go out and drive down unmapped roads, I can try to figure out whats breaking routes, and if there are high resolution Yahoo images where such routes are broken, than I can try to fix it. The result? One (or more) green routes on the distance table.
Long term goals? Making the best routable map of Brazil.
In the long run, OSM is turning into the best routable map of the world!