Welcome to Wrightwood!
When cal trans cinders a road, they spread gravel-like stuff all over it to help with traction.
I live up on Oriole, and I try not to head straight down to the highway on icy days. I go down a block, then over a block, then down a block, then over a block, all in my lowest gear. I have 4wd, but that doesn't really help with the ice; it helps with the snow.
I hate to put on chains, so I really love my 4wd. Also, I've lived in and around Wrightwood for the past 28 years. Rarely have we been trapped. Big winters like '01 only come along every once in a while. When they do, start a fire, put on the hot chocolate, and enjoy your day off!
KW