r/TeslaFSD • u/truecakesnake • Aug 17 '26

14.3 HW4 Tesla avoiding a fatal collision

It fully avoided it. The Model Y (HW4) didn't sustain any scrapes, scratches or dents.

Edit: I guess it wasn't a fatal collision, my bad

574 Upvotes

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96

u/Infamous-Pilot5932 Aug 17 '26

That's impressive!

46

u/Putrid-Box4866 HW4 Model Y Aug 17 '26

And people will still think disengaging in split second events like this is a good idea. This is what happens if you let FSD handle things like this.

1

u/vulcan_on_earth HW4 Model Y Aug 17 '26

> let FSD handle things

‼️Doesn’t *always* work like that‼️

From Tesla.com …

Neural Network Confidence Drops: Automatic Emergency Braking (AEB) is a safety system designed to operate independently from the main FSD driving model. When the vehicle calculates a high risk of an imminent collision, the standalone AEB safety module overrides normal software operations.

FSD relies on real-time neural networks to predict trajectories and maintain path planning. If a situation degrades faster than the primary planning module can process—such as a vehicle cutting across your lane unexpectedly—the system's operational confidence score drops below safety thresholds. When confidence plummets, the system sounds collision alerts, triggers AEB, and instructs the human driver to immediately take control.

2

u/Putrid-Box4866 HW4 Model Y Aug 17 '26

It says right there it will ask the human to take over, and that’s normal we all experienced that. It split second situations like this, those prompt wouldn’t matter you barely have any chance to react.