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Radar senses when a car is approaching too quickly, closing
within the parameters of a collision, and the horn is
alerting both drivers of the potential collision allowing the
rear driver more time to hit their brakes.
Easily retrofittable, you could buy a pair of these and strap
them to the front and back of your car. A simple, relatively
cheap solution that could prevent a lot of rear end
[not_morrison_rm, Oct 02 2016]
||Bonus if the horn noise comes from the cell phone -- it's about
the only thing drivers pay much attention to these days.
||Sort of like Cairo, nobody indicates,just beeping the horn all the time...
||Yea, to keep this from being just a bunch of noisemakers
on the street, there would be a very precisely adjusted
||The horn would sound just before the pint when the
current closing rate will cause a collision with the
approaching car in the front or back if brakes aren't
applied within the second or so reaction time needed from
when a driver hears the horn.
||So there would be an x y graph of when the horn sounds. x
being speed, y being distance between cars. Also there
would be no sounding of horns below a certain speed, say
15 miles per hour such as during heavy traffic jams.
||//The horn would sound just before the pint // Now
that would be a useful innovation.