Former NASA engineer Mark Rober has invented a fancy in-dash car horn with three custom settings. The first one is sort of a swift and friendly ‘toot, toot’ for when your regular horn is too aggressive. The other two? Well, I won’t spoil it but one is even friendlier than the first and the other is meant to get some real attention in “extreme situations.”
Mark says, “This horn is SO courteous my car was granted Canadian citizenship yesterday.”
(reddit)