Calcium chloride is universally used on rural roads to keep dust down. It works and is easy to apply. Also, plant some trees along side the road for long range planning. you can always cut them down if they pave the road or get in the way.
Don't know if it's true but one company told me that calcium chloride does not work in California because you need moisture for it to work and CA. Is to dry:confused3: If calcium chloride will rust tractor rims what will it do to someone's car