> Warning: Traffic-Aware Cruise Control can not detect all objects and may not brake/ decelerate for stationary vehicles, especially in situations when you are driving over 50 mph (80 km/h) and a vehicle you are following moves out of your driving path and a stationary vehicle or object is in front of you instead. Always pay attention to the road ahead and stay prepared to take immediate corrective action. Depending on Traffic-Aware Cruise Control to avoid a collision can result in serious injury or death. In addition, Traffic-Aware Cruise Control may react to vehicles or objects that either do not exist or are not in the lane of travel, causing Model X to slow down unnecessarily or inappropriately.
Commentary: as a Tesla M3 owner, I'm aware of this and can confirm. When a vehicle is completely stationary in the lane in front of you traffic aware cruise control might not see it as an obstruction. TACC uses _changes_ in the image sent from the various cameras to determine whether you have open road in front of you or a vehicle or other obstruction. If there is zero movement TACC will sometimes not be able to tell there is an obstruction.