Doesn't sound very promising, in terms of getting it made.
I don't think it will translate well to the screen without a LOT of core changes.
Just the central focus on the railway industry will be hard enough to deal with, in terms of writing a compelling script.
They've either got to frame it in the late 40's or else revamp the entire technology plot along modern lines. They've also got to edit down Galt's speech. It will take a master screenwriter.
In previous attempts to modernize the script I've heard that the AIRLINE industry has been inserted for the RAILROAD industry.