Ralph Mowery writes:
In article ,
says...

Salt with dye in it, so they can tell where they've already salted.

Over in Kansas, the pink 'road salt' is a mixture of beet juice with a
little bit of salt mixed in. They say beet juice works better than straight
salt and is easier on the underside of vehicles.




That's interisting. I was just reading about the mowers and tractors
that put liquid in the tires for extra weight and traction. Beet juice
was mentioned.

Calcium carbonate is a common additive to tractor tires to prevent the
water from freezing in cold climes.