You know, that reminds me. I say the coolest thing a couple of weeks ago on the Indiana Toll Road. They have warning lights triggered by intersecting beams along the roadway. The have a sign at each flasher saying, "If flashing, there is animal activity in close proximity to the roadway for the next 1 mile" (or whatever length the beam extended.
I only encountered 1 flashing light, and indeed, about 3/4 mile up the road was a small bambi licking salt off the road. Everyone had plenty of warning, used their flashers and all was right. Pretty cool!