Auxiliary car horn for driver who don't see the light change

Posted by realityinflux@reddit | CrazyIdeas | View on Reddit | 54 comments

Since I'm one of those people who is hesitant to blast my horn at the guy in front of me when the light changes to green and he's still texting or whatever, I'd like a button somewhere within easy reach that activates a little horn that isn't loud enough except for the guy right in front of me, and not rude or angry sounding. Just a couple of taps to make him look up and see the green light.