In my area, when it gets like that they throw down cinders, which makes for instant traction and doesn't kill the environment like salt will. Any chance of them doing that? Might call them and ask.

I really understand your frustration with this, since I live with it regularly every year. I know a few times our HOA didn't get on it right away and it turned into a week-long navigation disaster. At least you don't have our narrow twisty streets with hard turn angles to them and dropoffs. That's a nice silver lining for you. :)

Go get 'em!