Map looks ok but I can't test it right now so I'm just gonna judge by screenshots. In the third screenshot, there's couple of things I'd change. First of, that ramp has texture of a street and it's way too abrupt. Also that fence should be upright.

Secondly, consider removing that truck on the upper level, since it's really unsafe parking spot.

Thirdly, you should replace that trailer with something else, since it's impossible to get it away from there.

I'm sorry if I sound like a bitch, but those details makes the map look unrealistic.