why would you have any config for a road?You dont need one if you want to set in wrp-tool or visitor!And placing roads in the editor isnt very good i think.
What you need for a road is:
1. a resolution lod
2. a memory lod (with the points and selections named by leone)
3.a roadway lod(if you texture it with silnice or cesta texture to definie the roughness)
best thing is to take a BIS road,retexture it, binarize the model and place it with wrp-tool or visitor.After that you should get something like this: