There are days when the only safe speed is zero - do yourself a favor, just stay at home those days. Those drivers didn't, and now you can watch them from the balcony
Really, on icy winter days like this you needs very special driving skills that most drivers just don't have. The alternative would be spike tires, but they make sense in the climate where almost everybody has ice driving skills. So, if you have snow just a couple of weeks a year in your area, you are better off staying home.