Just a flyby, guys. Added these to a world I may never finish. Always starting them...
Just an idea-
I haven't seen this yet in a world, but if you have been using curbs, just ignore this thread(you might anyway)or if you have better ones, if you'd like, share them with us please.
I used the "Snap To Grid Mode" tool to go by to lay the roads. You can make curbs with curved roads, but it's tricky and the sidewalk textures don't curve, of course. Unless you have "curved sidewalk textures". Then I used the "valley-Gentle" tool to drop the road down a smidge or deeper(depth is your own preference) then the "Flatten Terrain" tool to drag the depth along. If you want to go back to this and it was lost in the forum, it will be in my blog later.
If you use CAW's sidewalk texture(or others) I think you need to paint it, then place the road accordingly, to line up with the seams in the sidewalk. I didn't take time in the first two images, but did in the last one.