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Mark Rober just set up one of the most interesting self-driving tests of 2025, and he did it by imitating Looney Tunes. The former NASA engineer and current YouTube mad scientist recreated the classic gag where Wile E. Coyote paints a tunnel onto a wall to fool the Road Runner.

Only this time, the test subject wasn’t a cartoon bird… it was a self-driving Tesla Model Y.

The result? A full-speed, 40 MPH impact straight into the wall. Watch the video and tell us what you think!

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[-] RambaZamba@feddit.org 48 points 2 months ago

Things that happen when you rely exclusively on optical sensors, i.e. cameras. But that's just cheaper, more money for Nazi Elon.

[-] Inkstainthebat@pawb.social 5 points 2 months ago

Are we reeeeally sure optical sensors with fast image recognition software are cheaper than LiDAR?

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[-] SirFasy@lemmy.world 30 points 2 months ago

Turns out having radar is rather important..

[-] KayLeadfoot@fedia.io 30 points 2 months ago

It's dirt cheap, too. If this was a cost-cutting measure, it was a thoroughly idiotic one. Which feels like the mark... of a certain someone I can think of

[-] Ghyste@sh.itjust.works 27 points 2 months ago

I seem to recall that fElon prevented the self driving team from utilizing LIDAR for any part of the system, instead demanding that everything run off of optical input. Does anyone else remember the same?

[-] 9point6@lemmy.world 16 points 2 months ago

Was just thinking this

A single LiDAR sensor prevents this kind of issue

[-] truthfultemporarily@feddit.org 4 points 2 months ago

Indeed there is a lidar car in the video and it works way better in many scenarios.

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[-] Arbiter@lemmy.world 6 points 2 months ago

Iirc they were using a combination of lidar and radar, but Elmo wanted to cut costs.

[-] cyd@lemmy.world 8 points 2 months ago

Funny thing is, the price of lidar is dropping like a stone; they are projected to be sub-$200 per unit soon. The technical consensus seems to be settling in on 2 or 3 lidars per car plus optical sensors, and Chinese EV brands are starting to provide self driving in baseline models, with lidars as part of the standard package.

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[-] NikkiDimes@lemmy.world 5 points 2 months ago* (last edited 2 months ago)

What's cool is that Teslas used to have radar sensors, at least, but Elon removed them from production to save money. Even if you have a car from back then, the software no longer uses them and they'll just physically unplug them the next time you have the car serviced, as it's just a drain on the battery at this point 🙃

[-] Quill7513@slrpnk.net 5 points 2 months ago

meanwhile our subaru has lidar for adaptive cruise control and emergency braking

[-] fulg@lemmy.world 7 points 2 months ago* (last edited 2 months ago)

I didn’t realize EyeSight had different versions, on the Solterra it looks like it is indeed LIDAR.

My Crosstrek has the older dual camera setup for depth perception, it would not be fooled by a picture of a road on a wall… I’m surprised the Teslas are.

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[-] magnus919@lemmy.brandyapple.com 20 points 2 months ago

I remember Elon foolishly saying his cars don’t need radar or lidar. Even software-disabling radar in cars that already had the hardware.

[-] gmtom@lemmy.world 19 points 2 months ago

Not even just his cars, he thinks the MILITARY, doesn't need radar and can just use cameras to spot and track stealth fighters.

He's a fucking lunatic.

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[-] slaneesh_is_right@lemmy.org 12 points 2 months ago

I mean his right, his cars don't need radar or lidar. They just drive into things.

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[-] lunarul@lemmy.world 19 points 2 months ago

My vacuum would pass that test... why is a Tesla worse at this?

[-] bier@feddit.nl 16 points 2 months ago

In short because Elon (wrongly) believes you only need cameras, he made the claim people also drive with just 2 eyes.

The thing is, we recognize a truck with stickers of a stopsign, while AI vision gets confused.

Waymo (Googles self driving side hussle) was build on lidar and other sensors and has been using robot taxis for many years now in geofenced specific areas.

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[-] Jeffool@lemmy.world 14 points 2 months ago* (last edited 2 months ago)

This would be hilarious if it weren't for shitty cars causing deaths.

That said, I always wondered why we don't find a system like RFID that could penetrate concrete and asphalt, and plant passive receivers in roads? We re-pave roads so damn often in this country (the U.S.) it seems like we could've knocked it out in the past couple of decades, minus our most rural areas.

I know RFID itself isn't strong enough, but I imagine that would've been an easier problem than figuring our complete self driving. Not to mention making GPS a secondary system for U.S. road travel in most cases.

Maybe it's just a dumb shower thought?

[-] bufalo1973@lemm.ee 7 points 2 months ago

I have another idea: echolocation and laser measurement.

[-] Jeffool@lemmy.world 5 points 2 months ago

I don't know the value of echolocation in this case, as I'm generally ignorant here, but it's straight wild to me that they went purely on visuals.

[-] dan@upvote.au 9 points 2 months ago* (last edited 2 months ago)

Tesla used to also have radar (and maybe lidar?) but they removed it as a cost cutting measure. If you ever see older videos of a Tesla slowing down or stopping due to a potential collision a few cars ahead, that's from before they switched to only relying on cameras. The collision avoidance was significantly better back then.

[-] towerful@programming.dev 5 points 2 months ago

Echolocation is specifically audio based.
Lidar is a similar technique, but much more accurate and precise.
Project a grid of laser beam, read when the laser bounces back, you know the distance to that part of the grid.

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[-] RobotZap10000@feddit.nl 13 points 2 months ago
[-] Buffalox@lemmy.world 11 points 2 months ago* (last edited 2 months ago)

The actual wall is way more convincing though.

[-] Gonzako@lemmy.world 9 points 2 months ago

still, this should be something the car ought to take into account. What if there's a glass in the way?

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[-] Naevermix@lemmy.world 10 points 2 months ago

Make Elon test ride the first Tesla robotaxi and there's a chance the funniest thing of all time will happen.

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[-] kameecoding@lemmy.world 8 points 2 months ago

This is why it's fucking stupid Tesla removed Lidar sensors and relies on cameras only.

But also who would want a tesla, fuck em

[-] AreaKode@lemmy.world 8 points 2 months ago

I was horrified when I learned that the autopilot relies entirely on cameras. Nope, nope, nope.

[-] aesthelete@lemmy.world 4 points 2 months ago* (last edited 2 months ago)

Leon said other sensors were unnecessary because human driving is all done through the sense of sight...proving that he has no idea how humans work either (despite purportedly being a human).

[-] bitchkat@lemmy.world 4 points 2 months ago

They never had lidarr. They used to have radar and uss but they decided "vision" was good enough. This conveniently occurred when they had supply chain issues during covid.

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[-] jewbacca117@lemmy.world 7 points 2 months ago

I read something a while back from a guy while wearing a T-shirt with a stop sign on it, a couple robotaxies stopped in front of him. It got me thinking you could cause some chaos walking around with a speed limit 65 shirt.

[-] heavydust@sh.itjust.works 6 points 2 months ago

Teslas did this in the past. There was also the issue of thinking that the moon was a red light or something.

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[-] Viri4thus@feddit.org 7 points 2 months ago* (last edited 2 months ago)

Who was the idiot that removed LiDar to cut costs?

/s

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[-] kamen@lemmy.world 6 points 2 months ago
[-] faberyayo@lemm.ee 6 points 2 months ago

Some cartoon shit

[-] Buffalox@lemmy.world 6 points 2 months ago* (last edited 2 months ago)

This is a very good test, and the car should have past. That said though, I hate the click bait format where they show a stupidly obvious cartoonish wall, when the real wall is way more convincing.

The Video:

That sort of clickbait is 100% sure to get a "do not recommend channel" from me, I'm so sick of it. And it's sad when the video has such a good point.

The Clickbait

I can see it's kind of funny, but it's misleading.

[-] MurrayL@lemmy.world 5 points 2 months ago

YouTubers - especially large channels like this - constantly A/B test with different thumbnails and stick with whatever one drives the most traffic (no pun intended) to the video.

You might not like it, but it’s unfortunately the reality of operating a content creation business on an algorithm-driven platform.

There are plenty of channels I follow that make fantastic videos, but sometimes you have to tolerate the shitty thumbnails because that’s just the reality of the system they’re operating within.

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[-] FlashMobOfOne@lemmy.world 4 points 2 months ago

I am very glad that Elon and Trump have overreached and now Tesla is suffering. I hope Starlink is the next domino to fall.

[-] Atmoro@lemmy.world 5 points 2 months ago

Yup plus the European Union is making their alternative to launch in a year or 2

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this post was submitted on 16 Mar 2025
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