Just like the head-light, it is really good that the horn of a car emits from the front, not side-ways. But I got this idea when I saw a driver who became obstructed by a girl, reversing from a bay. He honked the horn repeatedly but couldn't get the attention of the girl, so he intentionally "kissed" her with the rear bumber. Until he did that, the teen-aged girl never knew what the car horn from a seemingly distanced position ment.
It's really good that a car horn emits from the front, but I propose the horn of a car should be designed to emit from the back, each time the car is on reverse gear, to easily get the attention of any rear obstruction while reversing.
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