School zone sign and end of school zone signs are both covered by trees branches up until a certain point. The signs do not become fully visible until you are fairly close to them due to the tree branches covering them. Not only is it easy to miss the speed change because of the trees but also the officers stands in a yard with a radar gun (or what looks like a gun form a distance) and hides car along side street causing an additional distraction that could easily in the current situation cause one to miss the sign all together and allow him to catch you speeding.