I was driving through Grants Pass(Oregon) on I-5 today. Very snowy road condition. The semi in front of me started slowing down so I hit the brake. To my surprise, the X started skidding (I felt it was sliding toward the left line where there was another semi passing by), which actually scared me! Just when I thought it's going to hit the semi on my left, it stopped skidding and regained traction. I managed to get the X back in lane. I expect at least ABS should be engaged when it detects the vehicle is skidding and the brake is pressed, but at the time I didn't feel it was doing that. Anyone here with snowing driving experience, could you share your advice on how to better deal with this situation? Note we were all driving at around 25mph or even slower at the time; and my X has all season tires.