@chicken@lemmy.dbzer0.com @nostupidquestions@lemmy.world

One day I was driving on a highway at roughly 80km/h (no idea how much is it in miles per hour, we use metric around here), and there was a car almost glued to the back of the car I was driving, totally ignoring the "following/tracking distance" thing we're used to learn during driving school (the faster the vehicles, the farther they should be from one another, so if the vehicle ahead needs to do a sudden break, the vehicle behind have the time to react and break as well with no collisions). The car I was driving has a quite sensitive break light: a gentle push is enough for the breaking light to light up without actuating the breaking system (not ABS, it's an old car), so I had a quite unusual idea: Morse coding "DISTANCE" to the driver in the car behind through the breaking lights, using extremely gently pushes on the breaking pedal while I kept driving. I'm not sure if the driver could understand Morse, but at least I tried.

And that's a problem for your scenario where "nearby cars" were to contact each other: even though they could listen to each other, could they actually understand each other?