Visibility isn't particularly bad but the snow (and there's a lot of it already) is that dry, talc-like stuff that slides over itself like greased silicon pellets rather than packing down, and this city's snow-clearance policy consists of "it'll all disappear when it chinooks" ... in other words, virtually no plowing and a love of sprinkling sand here and there on top of the snow once it stops falling instead of during to put down a gritty surface for tires to grip. Add in the problem that everybody who owns a vehicle that is shown climbing mountains in commercials thinks they can drive as if it's summer and ... well, I'm sure you've seen idiots-behind-the-wheel in action where you live too. :-(
This is why I ordered pizza and salads last night, while all was clear and calm (I see no point in endangering delivery drivers unnecessarily). Plus fridge, freezer and cupboards are well stocked, as this may go on all weekend.
P.S. Re the computer virus warning yesterday ... I've added an update edit to that post.