Animal Control Technology

Mrs. Stewart and I and the youngest Stewart are in Illinois to visit the oldest Stewart child, who just completed Navy boot camp. On the way here I saw an interesting item while passing through Indiana. There are lights that flash if an animal, such as a deer I suspect, is potentially in the road ahead. Its interesting to see. There are large solar panels that power these systems. Along the road, there are white posts, which I assume have some kind of motion detector. When an animal breaks the signal, potentially moving on to the highway, the light starts to blink.

Its not that I am that well traveled, but this is the first time I have seen anything like this. I can only guess at what kind of animal problem warranted the implementation of this kind of technology. But whatever the reason, its a simple and clever use. Do you have a use that you have seen that addresses a local problem? Share it with us here!