2. The Honk Specifier: Since I first became able to drive, I've decried the inspecificity of honks. A honk is the only way to communicate with fellow drivers, and it is the most clumsy and blunt tool imaginable. A single honk can mean:
- Fuck you!
- Hey, pay attention.
- Excuse me, do you mind terribly? Thanks!
- Hey, I know you!
- Oops, I slipped and hit my horn.
- I was just in a crash and am dead.
So I propose a whole set of different honks. They would vary in pitch, and each pitch would mean a different thing. You'd have a high pitch for "move ahead please!" and a low pitch for "Go to hell." And maybe you could have a second sound for the location that you mean to direct the honk. Maybe the car could just say "North!" And it would always have to identify the sender of the honk, maybe by automatically tacking on "blue Honda!" assuming you drive a blue Honda. So if you were in a blue Honda and wanted the car in front of you to know that the light has turned green and it's time to go, your car says "North from blue Honda, (polite, high-pitched beep)!"
But that could be awfully noisy. Maybe instead you need an electronic news-ticker style thing on top of your car. You'd need four, one for each direction -- then you could light it up only in the direction of the person to whom you're honking. So you press the direction and type of honk. Each type of honk automatically corresponds to an intended message, and puts it on the correct electronic sign.
Then when you hear a honk, you look to see if you can see an electronic message. If you don't see one, you're in the clear, but if you see something saying "Move your ass!", then you know that that specific car is telling you specifically to move your specific ass.
You do run into the problem of too much thinking being required for each honk. But really, wouldn't that be good? Now people honk at the drop of a hat -- wouldn't it be nice if people had to stop and think for at least a split second exactly what they mean to communicate and to whom? Maybe you wouldn't end up with people honking like morons in the middle of a traffic jam that is no one's fault.
And I guess you'd still have to have a "panic" one that you can just quickly hit in an emergency. But if you did the "panic" one in non-emergencies, you should get arrested, or something. I haven't worked out all the bugs. But you get the idea.