Doesn't really feel urban, looks more industrial to me, but it's a nice effort.
Urban = city or town related. By a stretch industrial stuff can be put under that, but I digress anyway.Also, you should put more ties/sleepers under your rails.
More planks?
I need something to put on this big blank spot
looks great, good job. Are the buildings furnished or just empty? And I think you should add a small shack as a guard house, or a water tower. Most industrial/factory settings around where I live have these. If not, then put an open tower, like an observation deck without a roof. Or just another building
Building design is decent, layout is pretty good.Fill the empty space with packing containers like the ones you see on ships, or crates and stuff. Also, you should scatter more props around to give it a more crowded/industrial feel.