It's easy is you grew up in the "rust belt"It gets COLD and usually snows a lot here in the winter, and people have modern, powerful cars or rear-wheel drive, "all-season tires" that are worn, and don't know the difference between summer and winter driving. Therefore, the cities, to avoid all the lawsuits, spreads tons of salt to make winter driving "safer." Meanwhile, cars, trucks, and SUVs, which are designed & built with exposed bare-metal parts and no undercoating rust from the brine-water. Plus, people can't or don't wash the salt residue off daily, so it just stays on until Spring. Therefore, to protect our antique cars, which don't have the "corrosion protection" the newer cars enjoy, and thin coatings of paint on the bottom, and many bare-metal parts, must be protected from the brine; stay indoors somewhere until the Spring, when the salt is washed away by Mother Nature, and we sacrifice our newer vehicles instead.