How do you build up the track crossings on your layout? All the roads on mine are asphalt, and I've used several products from black sandpaper to adhesive-backed roadways. Fact is, almost most anything looks fine as a roadway - until you get to the tracks. Espicially on curves, how do you model a good looking crossing that looks high enough for vehicles to pass over, but not high enough to interfere with the trains as they go over in Nscale?