I wanted to post my experience this morning while using autopilot. I am a long time user of the system and know very well its capabilities and its limitations, but I never thought that the use of autopilot would actually save me from a crash as it did today. I am a physician in Florida where I was doing my daily commute on I-75. The traffic pace was about 60mph with moderate to heavy traffic. I was driving in the far right lane with autopilot engaged and a 2 on the TACC spacing. I was following a truck which was large enough to obstruct my view of the car ahead. But I did note that AP was registering the car in front of my lead car just fine despite me not having a view. Suddenly full emergency braking was activated on my car, which startled me because the lead car was still moving at a normal speed and I could not detect a problem. A split second later the car directly in front of me veered into the shoulder to avoid hitting the car in front of him which had stopped abruptly for road debris. The AP in my car managed to brake even before the car in front of me acted and was able to come to a full stop with a decent amount of room between me and what was the second car ahead of me. The original lead car was now stuck on the side of the road. This scenario perfectly demonstrated how the new AP car tracking system works to make things safer. If I was driving manually, it is unlikely that I would have been able to stop in time, since I could not see the car that had stopped. The car reacted well before the car ahead of me reacted and that made the difference between a crash and a hard stop. Strong work Telsa, thanks for saving me.