It's interesting. I can see what you mean about the negative space, I often place a lot of it in my photos, but I can understand why it wouldn't work here.
I love your crops. My nit pick for #1 would be that the top curve is nearly tangent to the frame, so when your eye follows it, it runs off the side of the photo which can be jarring. #2 nit pick would be that by cropping the bottom, there is almost nothing left in critical focus; this can be a good thing, but leaves the photo without the gradual change as you follow the road up, which is what I was aiming for.
Thanks for the input!