Near Crash Experience - Incredible Tesla Engineering Saved my Model S

I was merging into the highway and this driver out of blue decided to switch lanes. The car was partially obscured by the car behind it but I was attentive to the road as I was merging. I noticed the car initially but the sudden lane switching was totally unexpected. I swerved fast to avoid a crash and the Model S P100D handled it pretty well. No side roll or loss of control. Just smooth avoidance. 19“ Potenza all season tired. I was fortunate as that driver didn’t know where to go and everything happened i