The right front suspension failed. Something broke so that the wheel/brake component bent away from the car causing a sudden left hand turn/jerk. This was confirmed upon exiting the car and looking at the front right semi-attached wheel. The car traveled THROUGH highway safety cables, front windshield shattered, right passenger side arm bag deployed and car stopped in median before going into oncoming traffic. The car is currently being picked up and accessed by insurance company. No warning lamps or messages. The front end did seem to "float" prior to the accident - I figured I had a tire problem and was looking to exit the highway up the road. I went to the ER and had flying glass injuries resulting from the crash. Car is a "garage queen!" I never race or have never been on a race track. I have all records of care. No prior accidents or changes have been made to the car. It is 22 years old and was in excellent shape. I have read about incidents like this since the accident - specific to this car model in online sources. I am reporting this to my local Porsche club also so they can be proactive.