You are putting too much emphasis on that word "traveling". That's not the way I interpret it.
That second statement is not correct. I think you might be forgetting about Alberts ole saying "It's all relative". A stationary object in front of the car (a truck in this case) is not perceived by the "sensors" to be stationary because the Tesla is moving. It is only perceived to be stationary if both the Tesla and the truck are stationary
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
So to say another way, it is somewhat similar if the Tesla is not moving, but the truck is coming toward the car.
1. I'm convinced Tesla's legal department insisted on the placement of the word "traveling" in that precise spot for the excellent reason of evading liability when at highway speed the AP product crams itself + inattentive user all up in a parked Fire-Truck or similar massive obstacle, as has already all too frequently happened.
2. If the suit of Walter Huang's survivors makes it into court we shall likely hear Tesla seek to rely heavily on this subtle phrasing, as the gore-point he hit was not travelling, thus no sensors were designed to detect it, hence all his own fault and no liability for contributory negligence attaches to Tesla. Which would be a pretty embarrassing tack for them to air in public, so they will undoubtedly attempt to settle beforehand.
3. I'm beginning to suspect Musk's attitude here is (perhaps necessarily) encapsulated by the cynical but memorable
Fight Club maxim:
"A new car built by my company leaves somewhere traveling at 75 mph. Under Autopilot it locks onto the wrong lane lines into a gore-point. The car crashes and burns with everyone trapped inside. Now, should we initiate a recall? Take the number of vehicles in the field,
A, multiply by the probable rate of failure,
B, multiply by the average out-of-court settlement,
C.
A times
B times
C equals
X. If
X is less than the cost of a recall, we don't do one. [i.e. it works out cheaper to let people die than to fix things]"
In his defence he probably always somewhat naïvely thought vision would be "solved" long before this became a major problem, i.e. X > cost of recall, and now believes HW3 will soon cure all that ails AP.
4. The statement "
For the purposes of AP detecting a slow-moving perpendicular truck up ahead, it is effectively a stationary object" is correct: doppler radar picks up things moving relative to the stationary background, hence a parked Tesla's radar will detect a truck moving towards it from the front
but not vice versa, and other OEMs have the same problem. The Tesla manual specifically warns that at highway speeds it may not brake for stationary objects, see my signature for one personal experience. If it were otherwise they would not only change the manual but surely shout it from the PR rooftops with a video demo of this amazing safety breakthrough. I expect that to happen within the next year via the development of software for pseudo-LiDAR 3D depth mapping from vision on HW3/FSD.
5. Large objects (e.g. semi-trailer) crossing at 90° are, from POV of approaching car, effectively not moving relative to background so are not detected by the radar hence the AP-related deaths of Jeremy Banner and Josh Brown, in both which cases the system made no attempt to brake.
6. It is better to err on the side of caution than to be surprised in the crucial instant and suddenly appended to the list of unfortunate statistics.