The full table will be 3×4 tiles with the sewer river across the shorter side. I planned to make an 8″ broad road crossing the river but I think it looks to broad. I want the board to be 4′ broad that’s why I need an 8″ inch road in total. But what about two roads, 4″ each? Or maybe one 4″ road and one 4″ pipeline across the table (and the river)? Any ideas anyone? There’s a picture with a prototype 6″ bridge.