I have an idea:

What about an International Ulethan Motorway network?

This would basically work like the real world E-** road network, and would span the entire continent of Uletha. I believe this would fix the messes that people maoe when mapping highways, and would certainly improve international border crossing.

My ideas are:

-The roads would be numbered from U/I/M-1

-They wouldnt have to be newly built roads, but rather a layer on a layer.(i.e we would simp,y take the nice motorways that people build and add an international number to them)

-They would start somewhere in Pretany, Kalm or possibly the countries in western Uletha, and would slowly spider outwards into the northern and eastern regions.