A highway overpass concealing track thru backdrop

[Lester Perry]

I tried using grey foam sheet from A.C. Moore and got a very nice looking road .I took a ultra fine yellow paint pen and made a center line very lightly. Then dusted some black pastel dust very lightly. (after paint dried). Then took a vehicle and run it through the black dust. and across the center line as there was a industrial road coming in This made the paint appear worn at the turn. last was to seal it. I don't remember what I used to seal it with, probably dulcoat. The foam was correct thickness to run right up to track and easily cut with xacto knife for tight fit. It was a little thick for between the rails if you use Kadees with the wire on them. You might want to sand the foam a little for between the rails. I didn't sand it and the trip wire drags a very small amount which put a black stain on the foam looking like oil & dirt. This isn't a very good photo of it but it is all I can find right now. Give it a try, its not like it is expensive. get a sheet a play around with it.