It's kind of hard to tell with the low camera and no depth perception, but it looked to me like the hatchback did between one and three unsafe things there. An

It's kind of hard to tell with the low camera and no depth perception, but it looked to me like the hatchback did between one and three unsafe things there. An autopilot would presumably just not do these things, thereby avoiding the accident. A good driver would do the same, though. 1) Approaching the SUV too closely (can't be sure of this one, it's possible that the SUV moved into the left lane just prior to the start of the video). Even at the beginning of the video, the hatchback was too close to the SUV. 2) Attempting a lane change while too close to the vehicle in front and the vehicle to the right. Lane changes are the most dangerous maneuvers in highway driving, because they divide your attention and may not be anticipated by other motorists. You want more space than you would normally need both in front and to the side you're merging toward. 3) Accelerating during to the lane change. I'm not sure that this is what happened; it's difficult to tell without stereoscopic depth perception. What I think happened is that the driver of the red hatchback accelerated during the lane change, approaching the speed they wanted once they were in the clear lane. This is very commonly done, but it trades away a lot of safety in exchange for a little time. In any significant traffic, you should complete the lane change first, then accelerate to the desired speed for the new lane.