Pola, Unfortunately we aren't creating modular pieces for this project. I can't go into detail, but we're recreating a city and it must match the real world as accurately as possible. We are using the method of extruding the roads along a curve, but I am still getting some choppy areas. I think I may have to just keep…
I'm not entirely sure what you need to achieve without a visual aid. Though as far as roads go, are you able to do modular pieces? And link those together, perhaps throw in some deformers if you need a bit more variance/control in some places. You could also possibly extrude the road along a curve?