Thanks weiland and alexz
One more question if I may in the use of Potlatch. There is a street in Grafton that has a small traffic slowing curve and a one way restriction (you can travel from Carlton Gore Road to Khyber Pass Road but not in the other direction) at that point (the rest of each side of that restricted area is two way). I have no idea how to use Potlatch to show this. Can I ask for your help again
Thanks