That looks great, the grey and turquoise fit together really nicely! I also like the very long aspect, it's not very common I see what Feanaaro means about the brains effect though, I think you have a bit too many dead ends in (what I guess is) the older parts of the city. Some more narrow alleys to cut those large irregular buildings into smaller sections would make it look more realistic, I think. Also, the train tracks look like they curve too sharply – trains need really big curve radii. But, nitpicks! It looks awesome anyway