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I had the same exact situation happen a few months ago and had posted about it. Mine was on the NJTPK around Newark, NJ when the car and truck lanes begin. My car decided to head straight for the middle divider separating the car and truck lanes. I think others’ have experienced similar issues. Picture below is the exact area where this occurred. The red arrow is my lane I was in and direction of travel.
View attachment 426903
Do you live close and can you repeat the drive? If not does anyone else live in the area that can give it a try and see if it is a one off mistake or if it repeatable and happens all the time.
It’s beta technology. This is why we’re told to monitor it and be prepared to take over. It keeps getting better with every mile, glad you put bug report in as a situation to be reviewed.
While in beta, I would prefer to drive conservatively and need to have lots of time, buffer, distance... to react rather than to push the envelope to see whether there will be an accident or not.
In this case, it might be true that Autopilot would not slam right into the gore point concrete divider but I would not recommend to "have gritted my teeth a little longer and seen that the car did not, in fact, leave the lane..."
The Apple Engineer in Mountain View, CA already died in this scenario already so I am very much against risking an additional death for taking the risk to play with a very dangerous scenario.
Its job is to center within a present lane and not to make a decision on whether to leave the present lane
Again take a look at my graphic, it's not deciding to leave the lane, it's keeping itself centered in what it thought was the lane. In the frame I grabbed it "appears" the white line on black is the left line, and the dashed line on the right is the right line. So it did it's job by keeping itself centered between those two lines as they widened apart. Our human brain can clearly see that this is a mistake because there's a barrier around the bend and other cues beyond the low contrast pavement, but the AP cannot discern that until too late.
That's great ... but right now you have examples of the cars driving straight into a barricade. Literally, a fatal error. Until they have improved their computer's "vision", which I think will take years and far more hardware, they need to preload "knowledge" into the system. So, right now, you would compare the vision system's idea of the world with that from GPS and preloaded maps, and if the don't closely match, you automatically drop out of AP mode. If the GPS system appears to be unreliable, drop out of AP mode.
...underpass...
.
I would seamlessly hold on the steering wheel to correct it in this case so I got used to it and I would not notice any difference.
...over reaction...
The goal is to get the tactile feedback from the system.