It doesn’t yet exist, but if it did it would cover an urban area and stop the overzealous horns of cars. Too often, people honk to honk creating noise and unnecessary frustration for other drivers, pedestrians and apartment dwellers. The honk has evolved into a way to shout out the driver’s frustration, rather than warn another vehicle or pedestrian they are crossing into a dangerous situation.
It would be great to see this created and used… I’d love to see (and not hear) quiet traffic jams and slow lights.