The issue is with the "road departure mitigation" (rdm)system. The system may have been working as designed: But if so it created a correction that may have resulted in a serious accident. The issue occurred at a point where the road abruptly changes from a single lane to a three-lane road. The three-lane road has a solid divider between the three West-bound lanes and the three-East bound lanes. The normal procedure is to enter the three-lane going straight ahead and then move to the right as desired to get into the middle or right-hand lane. In other words the single-lane road mergers into the left-hand lane if you keep the steering straight ahead. As I approached the transition point the rdm suddenly pulled the steering wheel to the right (creating about a 30 degree change in direction) and applied heavy braking. If that action had occurred on a two lane road with a car on my right it would have resulted in a collision. Since there was an abrupt change in lane markings and the solid center divider close ahead; I suspect the rdm interpreted that situation as "I was about to crash into something". the owner's guide says it will do exactly what it did. But in this case it could have replaced one type of crash with another type of crash; or more impotently created a crash that would never have happened at all !!

- Lancaster, CA, USA