[bee_rider]

I would imagine that different countries might had slightly different traffic laws or acceptable risk levels, so might want to have their own licensing schemes. Maybe the could have a unified form-factor that gets stamped by the individual countries though.

[joeschmopoe]

They do, all IDs are in ID-1 form factor, stamped by the countries and the EU [1].

It's the same for driver's licenses [2], they are accepted in all EU member states and basically look exactly the same, just in different languages and show a different flag.

[1] https://en.m.wikipedia.org/wiki/National_identity_cards_in_t...

[2] https://en.m.wikipedia.org/wiki/European_driving_licence