Guys, I'm starting to build my steel trestle, and was wondering if I should add a walkway down the side. Looking are prototype pics from all eras, I see some trestles have walkways and some do not. Is there some sort of regulation about having a walkway or not? Or was some rule imposed after a certain year that they all need to have one?
I don't really want to bother with adding one, but I want it to be as close to prototype as possible.