I searched this site and it seems the most recent discussion about this topic is from 2020 so I thought I'd start a new one.
After much research on effectiveness and environmental & safety risks, our road association decided to have a local company apply a solution containing magnesium chloride to the roads. https://www.innovativecompany.com/magnesium-chloride-dust-control.php
We understood that magnesium chloride is slightly less caustic than sodium chloride. The product was applied two years in a row and we found it to be effective. Last year the company that applied the magnesium chloride to our roads informed us that they no longer provide the service. We could not find another company to apply the product and fortunately it was a wetter than normal summer last year.
Our road association is in Kennebunkport and we have about 1.5 miles of gravel roads. Does anyone have information to share about dust control products they have used and companies that apply them?