I was wondering the same thing. They should be fine; for a while at least. I believe that three issues down the road could be 1) close spacing, limbs hanging over the roadway (yes, they will reall grow horizontally), and 3) large leaves and "cones" than don't rot well all over the roadway. Just sayin' Hell, I'll probably be dead or daft by then!
Mike
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Michael K. Carroll