blue92rs
Cheaper than therapy!
I like where you are going with the bridges. What you have laid out has a lot of potential. Multi track spans look very cool. One thought is aquire some N scale girders and carefully using a heat gun to bend them to follow with the curve of the tracks, then kitbash them together to get the desired length. For the center support on the longer span cast a support with plaster or hydrocal (not to difficult) then weather it to appear like a large concrete support. That way you could get your proportion correct. I resolved my issue where the only place I could model a river scene was on a curve where I also have a grade. I used a Walther's arched road bridge to simulate a large culvert. I totally took the idea from an issue of M.R.