It seems to me, you are the one who misunderstands the document. The example I quoted was exactly pointing out a situation where the system is NOT ABLE to recognize the problem, such as a vehicle mechanical failure, so the human has to recognize it and take over without ADS issueing a request to intervene.
Frankly it looks like you are refusing to read the document. You are literally posting a soundbite and claiming the soundbite is actually saying what you want it to say rather than reading the entire document as a whole and taking it in context.
Are you claiming, that you can see a trailer hitch falling off a truck in front of you when you are watching a movie and not paying attention to the road ?
This is a classic example of you not understanding what the document is saying. Its explaining the concept of monitoring versus being receptive. That a user being receptive is NOT MONITORING. So if you were reading a book and your car starts beeping, you will become aware of it. That's what receptive is.
EDIT: It uses an example of you being in a car where the trailer hitch fell off. Its not talking about a trailer hitch of a car next/in-front of you. But a trailer hitch of your car that you are driving and yes you will feel it if your trailer hitch fell off. But you weren't monitoring it, just like you will be aware of a fire alarm but you weren't monitoring it before hand.
Exactly, the actual definition of the level 3 system is on Page 22, which clearly states that the DDT fallback-ready user must be receptive and take over in a timely manner.
receptive IS NOT MONITORING.
Our disagreement comes down to the interpretation of receptive DDT fallback-ready user.
You think a person watching a movie or reading a book qualifies, and I absolutely disagree based on several examples cited by the SAE document. If the "driver" is not paying attention, then s/he will not be able to notice a problem / system-failure fast enough and take over in a timely manner as required by the SAE definition.
There is no disagreement, you are simply wrong. The driver DOESNT pay attention. The user is NOT SUPPOSED to notice a system failure, the ADS system does and handles it while providing sufficient time to hand over back to the user.
There are two responsibility of a user in a Level 3 system.
1) Be receptive of system requests to take over which happens through audible,visual, or and vibration feedback.
2) Be receptive to "kinesthetically-apparent vehicle failure" like a "broken tire rod", "broken suspension component"
"A vehicle with an engaged level 3 ADS experiences a broken tie rod, which causes the vehicle to handle very poorly, giving the fallback-ready user ample kinesthetic feedback indicating a vehicle malfunction necessitating intervention. The fallback-ready user responds by resuming the DDT, turning on the hazard lamps, and pulling the vehicle onto the closest road shoulder, thereby achieving a minimal risk condition."
If the "driver" is not paying attention, then s/he will not be able to notice a problem / system-failure fast enough and take over in a timely manner as required by the SAE definition.
This completely contradicts the SAE document as it explicitly says that the user DOES NOT monitor the environment nor the performance of the ADS system.
The Toyota research exec on the video is a clear example of deliberately spreading FUD, trying to explain away why they do not have and not even working on a level 3 system, because it is "too hard" in his incorrect interpretation. He was trying to make a ridiculous claim that the system would need to recognize ~1500 yard ahead that there will be a problem so it can alert the movie-watching user to take over in time. By that interpretation nobody can ever make a level 3 system, because it is simply impossible.
That's exactly what a high speed Level 3 system will need to provide. That's not FUD, that's just you refusing to read the document. A traffic jam level 3 can get away with something like 5-7 seconds. But a 80 MPH for example would need 10+ seconds.
"In the event of a DDT performance-relevant system failure in a level 3 ADS or in the event that the ADS will soon exit its ODD, the ADS will issue a request to intervene within sufficient time for a typical person to respond appropriately to the driving situation at hand"
Notice how the driver is NOT paying attention after activating the system and is instead playing with his kid in the back-seat?