1. I agree, love the colors.
2. I like your approach at the subject.
3. But something is distracting me. I know the blown out sky is one thing, but something else. Is it possibly over saturated? Or over sharpened? I just cant put my finger on it. I am an amateur so I just cant figure it out. what about the picture as a whole is making my eyes jump around? As Ecce Signum said "it screams b&w" but that would be a shame to lose the rich colors.
BUT MOST OF ALL IT IS A GOOD PHOTOGRAPH WITH GREAT COLORS.
NOTE: This is an amateur opinion
I agree with Aznym, the colours are excellent. As for the leaves, rather than crop them I'd like to see more and make the background 1/3rd leaves, 1/3 trailer then the wheels. The mood of this picture seems to be screaming black and white to me but it would be a shame to lose the rich colours. The little bit of sky is slightly distracting but not overly.
Colours: aboslutely love them.
Composition: It's ok, I don't find it special, and yeah, I do find the top part a bit distracting. Slightly less of the leaves might work well. Then again, maybe this is what you intended.