my apple tree likes the fence

My wolf river apple tree likes the fence between it and the road.

I took this a few days ago. The tree is preferentially growing toward the fence and the part that is below and behind the fence is in full bloom and gorgeous. The rest of the tree is budding but not in full bloom.

What does it like about the fence? Shelter from the cars in the road? The fence is to the west, so it shouldn’t do much for warmth, but that could be part of it. Maybe it does not like the car exhaust.

Maybe I should extend the fence a little higher in that corner. Just to please my tree….