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by AlotOfReading 802 days ago
Having worked with these kinds of systems, it can be difficult to tell from the driver's seat the actual effects of that change. It may have reduced false positives and true positives. It may have simply moved the false positives into scenarios you don't encounter. It may have not affected the true positive rate at all, but might have made positive identification slower and thus violated a real-time constraint elsewhere in the system leading to accidents. I've actually seen this last one root caused before.

The only people who have the data to know whether removing radar was safety net positive or not work(ed) at Tesla and can't say. Even then, they probably wouldn't know whether the system could have given better results with different changes.

1 comments

Ehh. I had the same streach of road that resulted in three phantom breaking situations (one of them not in a tesla, but in a toyota). Steep descent on a road with a rail road crossing with exposed rails. No issues at all once the vision only upgrade hit both my M3 and MY (which has HW3). It's possible that they put in some other fix at the same time, but they stated at the time that sensor fusion was a big reason for phantom breaking, so I take them at their word that this was fix.
That's not quite their point though. Completely deactivating the emergency breaking system would also solve the phantom breaking problem, and since the average person does not end up in situations which ought to trigger the feature that often it's unlikely any individual driver would ever notice that is was broken.
I'm not doubting that it went away for you. You know what you've experienced a lot better than I do. Everything I listed is consistent with that observation though and it's impossible to differentiate between them without internal data.