Neat stuff, though it lacks consistency of style in a couple of spots. Like in the greenish-gray waterfront area I see that you've shaded in a typical isometric manner by making one of the edges a bright highlight and using strong outlines. If you look at the building in the top left corner, it's like you decided to change your mind and forgot about having complete border outlines and got rid of the highlighted edge. Then if we move to the water and look at the boat we see something even more different in style than the rest of the image. You've shifted in style once more and completely removed the outlined look, and gone with a simpler midtones+shadows style of shading describing the shape without any help from lineart.
Actually, the boat is probably my favourite part of the entire iamge. If it wasn't too time consuming to do compared to the usually style, it'd be pretty cool to see your next city in the style of the boat. I also like that you weren't too afraid the mix up the angles here, adds a lot to see the trains bending more gradually and makes the streets more interesting to look at.
