This particular mixture (salt grind with calcium chloride and a sugar beet juice additive) is pre-applied to the roads to help prevent the snow from sticking to the road. This de-icing treatment is being used in Des Moines, IA and similar de-icing procedures are also being used in Omaha, Nebraska too.
Check out this news report from Des Moines for more information on this mixture and its application.
I wanted to learn more about this special beet juice additive and I came across this article. “Entrepreneur touts beet juice road deicing recipe” (Check out the video in this article for more explanation.) It is interesting how we continue to find organic solutions to solve problems that in the past no one would have considered.