I adore this photo. No, really, I do. You've captured something that most people see everyday - and simply walk past - in a simple yet interesting way. The colours are outstanding... bright but not overpowering. The autumn colours have been captured beautifully - we can tell straight away when this was taken.
The shadow of the tree adds another dimension to the photo - the shorter days, sun lower in the sky...to see it reaching out to its neighbours. I like how you've managed to remain hidden in the photo despite the focus on the idea of long shadows.
My only slight crit would be the tree just nudging in on the right...but that's me just being in a picky mood this morning