Underpass Part 2

I've made continued progress on the underpass.  First of all, I cut the Walthers double track abutments and wings to the proper size and glued them in place.  The color was close but I did paint them with the same aged concrete color Rustoleum paint I've used in other projects.  I will place the bridge support columns later.  After a lot of thought and reading about some methods, I went with some cardboard supports on the embankments.  I built from there with strips of Woodland Scenics plaster cloth.  On the left side I found that the plaster cloth didn't sit as taut as I imagined, so I had augment some parts later with more strips.  On the right side, I used some masking tape to make some cross supports so this effect wasn't so visible.  On the little parts on the other side of the tracks, I used some foam pieces and masking tape for a base for the plaster cloth pieces.  I'm pretty happy with how all this came out so far.  The cloth is really easy to work with and hardens quickly.  It's not quite as smooth an embankment as I imagined but maybe I'll figure out some way to deal with that.  As for the incline of the road - I tried some putty first on the top and bottom edges but this wouldn't dry.  I removed that and replaced it with spackle.  So far, so good.  The next steps are to whip up some Smooth It plaster for the road surface and sidewalks, and place the bridge support columns.  And finally, the girders for the sides of the bridge.

Lessons learned:

1. Make sure whatever you're putting the plaster cloth on has enough supports on its own, before it dries.
2. Putty won't dry, but spackle will, and you can sand it later.