Take the bus.

Too easy to slide under the wheels of an oncoming car.
I've been stuck riding home in 1-2 " of snow- went 15-25 for 6 miles, went down once when I pulled off to the side to let cars by and left the pavement with the front tire.
All you can do is roll - the brake puts you into a skid, leaning and the bike slides out under you. Accelerate hard and the back end slides out. It is the unexpected that makes it unsafe. Go out into a field of frozen lake if you want to play.
Take the bus.