The Mercosur, a regional bloc comprising Argentina, Brazil, Paraguay, Uruguay and Venezuela, intends to adopt uniform vehicle registration plates, like European Union already did. Trucks and buses must adopt it from 2016, other vehicles from 2018. On recent news, it's possible to see prototypes for the model, that can be seen here. I think the model rather ugly, so I decided for my own attempt.
The plates on the linked image follow the color scheme of respective countries. I'll, at first, design an unified color scheme, totally inspired in Mercosur's flag. They contain the blocs's flag (in Portuguese for Brazil, otherwise in Spanish), the national flags, the countries names in native language and the local identification (already used in Brazil, Uruguay and Venezuela).
I particularly like the layout, and I think it's more similar to the current plates on the countries. I don't think a QR code is needed.
As I early wrote, the basic layout can be adapted to current colors and customs. Below, for example, there are vehicle plates inspired in current Brazilian ones.
I'm particularly happy with the results, because I achieved a clever color scheme with contrasting colors (fundamental to every type of plates).
Comments are welcome.
You can see my post about Mercosur flag here.