Great advice above, but (unless I missed it) a few things to add. Most of these are common sense, but worth stating and practicing.
- Ice is a much bigger problem than snow, and packed snow is more challenging than fresh. Know what you're driving on. I will often test my stopping capability by slamming the brake when no ones behind me and see how quick I can stop. In the mountains, this can not only change rapidly, but so to the slope of the road. Test often and adjust your speed as necessary. It's a scary feeling to test and find you're going way too fast, but that's way better when you have time to adjust back down to a safe speed.
- Tread depth makes a huge difference in snow. Your capability from the previous year may not be the same.
- Where most people get into trouble is ice that's covered by snow, or "black ice". Either case you won't see it coming and thus if you're already going slow you'll be in much better shape when you hit it.
- When you begin to slip, not only steer into the slide, as mentioned above, but take your foot off the gas and brake until the vehicle is in control. Antilock brakes have really changed the way you can control a vehicle in an emergency maneuver, but you have to have control of the vehicle before you slam on the brakes. If you do have to slam on the brakes, continue to steer into the slid as you slow down.
- Like normal driving, you need to have situational awareness. Are there cars next to me, behind me, etc. Choices in an emergency maneuver may be limited by your momentary surroundings.
- All things being equal, you can steer around a problem in less distance than stopping in front of it.
- Ice is a much bigger problem than snow, and packed snow is more challenging than fresh. Know what you're driving on. I will often test my stopping capability by slamming the brake when no ones behind me and see how quick I can stop. In the mountains, this can not only change rapidly, but so to the slope of the road. Test often and adjust your speed as necessary. It's a scary feeling to test and find you're going way too fast, but that's way better when you have time to adjust back down to a safe speed.
- Tread depth makes a huge difference in snow. Your capability from the previous year may not be the same.
- Where most people get into trouble is ice that's covered by snow, or "black ice". Either case you won't see it coming and thus if you're already going slow you'll be in much better shape when you hit it.
- When you begin to slip, not only steer into the slide, as mentioned above, but take your foot off the gas and brake until the vehicle is in control. Antilock brakes have really changed the way you can control a vehicle in an emergency maneuver, but you have to have control of the vehicle before you slam on the brakes. If you do have to slam on the brakes, continue to steer into the slid as you slow down.
- Like normal driving, you need to have situational awareness. Are there cars next to me, behind me, etc. Choices in an emergency maneuver may be limited by your momentary surroundings.
- All things being equal, you can steer around a problem in less distance than stopping in front of it.