salt gritting roads

as we know our weather is becoming strange we dont know whats in store for us , the idea ive come up with is in the winter time we get all sorts of snow ice the usual weather we get am a big fan of ford cars i own a 011 ford c max and i love it , what am saying is there are millions of cars on our roads and ive come up with this idea if every car and van truck had a little device underneath like say a box big enough to install salt or grit and release it like our snow ploughs do it would make a big change to our road for the future cheers george .
Jeffrey Z 02/01/2013
added weight, more chance of rust, if it gets wet, it freezes solid, added complexity, limited service life. Great thought, but completely un applicable for anything but commercial vehicles.