It's a trick question. You don't should be the response.

For those that do, my first question is what is so damn important that you have to be driving in icy conditions in the first place? Schools are closed. Most businesses are closed. If my business isn't closed, I use a personal day. This isn't Chicago/Minneapolis where the snow lasts for 3 months. This is N. Texas. It's typically only cold enough for these conditions for a couple of days and typically only at night. Which actually makes it worse as it melts in the day, refreezes overnight, and people forget about the refreeze and drive as if things are normal.