Here is one of those walls built along a highway to block sound for residents near the road.

This wall has poison ivy happily growing up the wall, then exploding along the top where there is no more wall to climb.

This  poison ivy is harmless to drivers (unless it burns) but might cuase trouble to workers who might be asked to trim back the vines.

And this vine will probably start to drop seedlings and new vines on the residential side.