Streets and highways covered with snow, snow pack, or ice are extremely hazardous. They are most hazardous when the snow or ice begins to melt. The slush or wet surface acts as a lubricant and traction is reduced.
Extreme weather conditions may require special equipment (e.g., tire chains) and/or special skills by the driver (e.g., slow starts and stops).
If you begin to skid, let up on the accelerator and turn the front wheels in the direction of the skid.