@nsfmc heh, just 1 hr ago I was marveling over how counterproductive these are.
During winter in NE, many parking spots trigger these alarms with all that snow piled inches in front of your bumper.
Which is *most* disconcerting when you get back in the car after an errand and said klaxons immediately begin. (Distracting you from any real threats that are actually behind you).
@nsfmc Yeah, I'm still a skeptic, although I will admit the scenario where the front collision warning goes off while driving (typically because person in front of me suddenly braked) is useful.