So I'm trying to model the roads and parking lots on my layout using sheet styrene and have some questions. 1. I read some people modelling roads higher than the surrounding grade. They'll put in a subroadbed I guess to raise the road a bit. My uneducated observations tell me that roads aren't always above grade. I've seen plenty that appear to be right at ground level. For those that aren't, do you think it's work the extra effort in N scale to try to model that? 2. For sidewalks I was thinking about using a slightly thicker sheet of styrene (I was going to use .20 or .30 for the road itself) and just apply a strip of the appropriate length to the edge of the road, and then score it to make it look like sidewalk sections. Any tips for doing this? What thickness of styrene do you think would look right for the sidewalk? 3. For curbs (where there is no sidewalk) I saw the idea of using strip styrene glued to the edge of the street. Again, any suggestions on this? Any suggestions as to the size of the strip to use? 4. Finally, while it makes sense to depict the sidewalk and curb tops higher than the road surface, on the side away from the road it won't look right to have a drop off. I suppose I could fill that in with a little spackle or just plain ground foam/static grass and taper it down away from the sidewalk/curb, but I'm wondering if that will look stupid. Note, this part of my layout isn't on foam so I can't easily cut down into the surface. Thanks for any suggestions.