This case involves a couple that was driving on an exit ramp, and they were injured by a tree that fell on top of their car. The trees were on a property adjacent to the highway controlled by the government. When an investigator went out to the parkway, there was a group of trees that had been falling in the same area. The plaintiffs alleged that the trees must have been in a weakened condition for quite some time and the trees falling should have been noticed and future accidents prevented. An arborist was sought to opine on the issue.