BMW announced a new feature for its cars — WAIL, which stood for "Wildlife Acoustic Information Link." It was a device designed to prevent animals from becoming roadkill by emitting high-pitched soundwaves (inaudible to human ears, but audible to animals) that sent critters scurrying out of the way:
"This operates on the same ultrasonic echo-sounding principle as BMW's Park Distance Control System. Sonic waves are emitted from the front bumper producing a warning call which alerts stray animals to the approaching car. This then encourages them to jump in the nearest hedgerow."