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And with the morning sun in your face (and blasting the auto pilot cameras) it becomes even harder to discern that line.
Also, coincidentally, in that particular picture, a car in that right carpool lane wouldn't see the upcoming gore point wall because the truck in front of them is blocking the view.
Of all the pictures posted so far, this one may sum it up best in terms of what could have gone wrong.
Trying to keep beside the car on your left. Trying to use the more prominent (but wrong) left lane marker, and vehicle in front blocking the view of the hazard ahead.
This is again a scenario where candlestick delineators (plastic poles) in the gore area (space between lanes) would have avoided such a scenario.
Note, the driver would have a better chance of seeing the gore point ahead being more left in the car. The autopilot cameras are centered, so would have the view blocked by the truck longer.