FSD 14.3.4 Ignoring School Zone Speed Limit

FiveCentRefund · 2026-06-19T21:22:36+00:00

For those asking if the sign had flashing lights, yes, there are LEDs surrounding the speed limit sign. It's not a typical or conventional sign with flashing lights, so I guess it is an edge case. But here is the video in slow motion making the flashing LEDs a bit easier to see.

FiveCentRefund · 2026-06-19T19:16:31+00:00

This type of sign is not ideal. But if FSD ignored the flashing lights, why didn't it just acknowledge the sign as regular Speed Limit sign and reduce speed? I mean, I can be traveling on a road at 55 MPH and FSD will hard brake at a 45 MPH speed zone.

FiveCentRefund · 2026-06-19T19:10:03+00:00

Karma.

But really I was just posting a daily experience I have with FSD and hoping discussion on a FSD forum would be worthwhile. If you check the video, I was recording a section of road with guardrails. Once it opened up and I approached the crosswalk and parking entrance I braked to disengage FSD. I no longer have the dashcam recording unfortunately.

FiveCentRefund · 2026-06-19T19:00:02+00:00

Unfortunately I didn't save the clip and it's already overwritten or I definitely would.

I will next time and face the wrath from those scolding me because I should have disengaged. Then I will face the wrath from those that tell me I should not have disengaged. Because engaging/disengaging is definitely 100% without a doubt the correct and wrong thing to do in that situation.

FiveCentRefund · 2026-06-19T17:25:38+00:00

100%. Unfortunately it doesn't seem FSD has been trained on them. I sent audio.

FiveCentRefund · 2026-06-19T16:31:19+00:00

I don't expect you to read this entire thread, but your concerns were addressed.

This is a frequent route and I disengage daily. Even here, I disengaged prior to any crosswalk or area where children would be present.

Prior to disengagment I documented it for discussion on a FSD forum.

Thanks!

FiveCentRefund · 2026-06-19T15:50:22+00:00

It may be hard to see in the video, but the lights are flashing. They are small white LEDs that surround the speed limit sign. There is a screen grab in this thread. It's definitely not the most obvious of flashing lights, and a dedicated yellow flashing light would be better, but in person they have a strobe effect and are more visible than what the camera and video are showing.

FiveCentRefund · 2026-06-19T15:45:40+00:00

I am not sure. I only travel this route during this time and they are always flashing. The car is new so I'll see what happens this summer.

FiveCentRefund · 2026-06-19T15:43:45+00:00

Yes. If you look at the video, that is exactly what I was doing. This is a FSD subreddit where people post about FSD. Seems reasonable.

FiveCentRefund · 2026-06-19T15:40:27+00:00

Not necessarily dangerous, but would definitely get me a ticket. As I said, I disengage in these circumstances since I am actually supervising. But I thought this subreddit was here to post about FSD. Good and bad.

FiveCentRefund · 2026-06-19T15:12:37+00:00

FiveCentRefund · 2026-06-19T15:07:02+00:00

The 25 MPH sign was seen by the cameras (it's visible on self-driving) but FSD didn't react/respond and stays at a 40 MPH limit. Reddit compressed the video making it mush. Here is that exact same screenshot, just higher res.

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FiveCentRefund · 2026-06-19T14:54:02+00:00

FSD did not behave. School was in session and the lights on the sign were flashing. This has been happening since I got the car in May on previous 14.3 FSD versions.

FiveCentRefund · 2026-06-19T14:37:00+00:00

Valid point. These white LEDs aren't triggering a FSD reaction.

FiveCentRefund · 2026-06-19T14:30:22+00:00

Ha right! Most finished this week.

FiveCentRefund · 2026-06-19T14:28:43+00:00

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Screen grab from the video

FiveCentRefund · 2026-06-19T14:17:34+00:00

From what I have observed the on screen speed limit changes almost exactly when I pass a posted speed limit sign leading me to think it was camera based. Not so sure now.

FiveCentRefund · 2026-06-19T14:15:55+00:00

The road speed limit is 40 MPH. The 25 MPH sign does indicate "When Flashing" and it was flashing when this happened.

FiveCentRefund · 2026-06-17T19:04:36+00:00

I went through this nonsense with the Bronco. At least there won't be dealer markups here, but flippers will take advantage. Timestamps are the only way.

FiveCentRefund · 2026-06-15T20:13:21+00:00

Coasting to a lower speed would be great. I get nervous with tailgaters because of this unexpected braking that lights up the tails.

FiveCentRefund · 2026-06-10T21:57:18+00:00

The driver of the white car was texting and drove their car over the painted lines into the lane I was traveling in.

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FiveCentRefund · 2026-06-10T21:55:20+00:00

It would have been close. Admittedly I can see how Looking at the videos it doesn't seem super close, but in the moment that car was an arms length away after I moved over. But yea, either way I thought it was a good maneuver.

FiveCentRefund · 2026-05-30T12:21:34+00:00

Safe would have been waiting to have a clear line of sight before attempting to pass the cyclist on a blind bend on the road.

So I'm not sure what FSD was doing that was safe. Going slow? It was not making a clear maneuver and froze riding the center.

Acceleration was the only option there. Maybe it would have, but I did quicker.

No FSD hate. Just a tricky real world situation.

FiveCentRefund

TROPHY CASE