@cotty said:

I'll try to be clearer, too
(if a step in the SU-file is not clear, let me know...)

how are you able to fill the intersected lines to get you from the non filled outline in step 3 of your model to the filled (gray) road in your step 4? thanks

@cotty: how are you able to fill in the intersect profile shape? or, how did you fill the new intersected road to make it solid? danke