NHTSA and Transport Canada are concerned about Tesla's removal of the Autopilot 'nag' screen
@Greentheonly/Twitter
On the day that the National Highway Traffic Safety Administration (NHTSA) released information about roadway fatalities, reporters were more interested in anything Tesla-related. Reuters stated the acting head of the NHTSA, Ann Carlson, made “comments to reporters on the sidelines of an event in Washington.” Those sideline comments were regarding the government’s review of crashes involving Teslas and the possibility of removing the steer wheel “nag” for Autopilot.
By the way, the NHTSA reported that fatalities due to car crashes in the United States appear to be leveling off after dramatic increases over the last two years. But back to Tesla.
Carlson told reporters that the government agency is investing a lot of resources in the Autopilot investigation that started in August of 2021. The acting head told Reuters, “The resources require a lot of technical expertise, actually some legal novelty, and so we're moving as quickly as we can, but we also want to be careful and make sure we have all the information we need."
Autopilot Changes are Coming
Part of the review is also said to investigate if drivers are paying attention when operating Tesla vehicles in Autopilot. The onboard alert system that assesses driver awareness has been activated in several crashes that the agency is investigating, which is why Carlson took particular interest in Elon Musk's recent tweet.
As we reported, Musk responded to a tweet from @WholeMarsBlog asking users with more than 10,000 FSD miles driven could have the option to disable the “tedious steering wheel nag.” Musk responded, "Agreed, update coming in Jan."
Carlson told reporters, “A very extensive investigation ongoing... We are in conversations with Tesla about this latest communication."
Removing the Nag
Musk also recently tweeted that a significant Full Self Driving update was coming in two weeks, including many major improvements. Given the timeline, this change to the steer wheel tension could be part of the FSD Beta V11.3 update. Therefore, it makes sense that the NHTSA has been in contact with Tesla. The results of its investigation could significantly impact the future of the autonomous vehicle vision that Musk has been working toward for years.
According to a recent tweet from DirtyTesla, he states a source told him that Transport Canada is already considering disallowing FSD Beta in Canada and that the removal of the steering wheel 'nag' could be the deciding factor.
DirtyTesla shared the message on Twitter:
"Transport Canada has been close to recommending they pull the plug on Beta in Canada because they don’t feel testing beta software with road users is safe. If the nag is removed they will most likely recommend it be pulled."
What Tesla Should Do
Tesla's reliance on detecting force being applied to the steering wheel was never a great solution. It doesn't provide continuous monitoring and it doesn't always properly detect resistance on the wheel, causing a lot of "not paying attention" prompts.
It sounds like Tesla is already in talks with the NHTSA, so we are hopeful that they're reaching an agreement they both feel good about. Other Advanced Driver Assistance Systems (ADAS), such as BlueCruise already have hands-free driving on select highways. BlueCruise only monitors driver behavior through a camera similar to Tesla's in-cabin camera.
Instead of Tesla phrasing this as the 'removal of the steering wheel nag,' they should state that they'll be transitioning to better driver monitoring by leveraging their cabin camera and machine learning. Tesla launched vison-based driver monitoring two years ago. There have undoubtedly been improvements and they should state that they're now ready to transition to a system that allows improved monitoring while also reducing the need to 'nag' drivers at specific intervals.
Over the past seven years, the NHTSA has conducted nearly 40 special investigations where authorities suspected Autopilot was in use so their concern is understood, however, Tesla could do better to put them at ease.
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Tesla has been quietly building something pretty unique on the streets of Hollywood—and we’ve been keeping a close eye on it. That’s right: the long-anticipated Tesla Hollywood Drive-In, Diner, and Supercharger is shaping up to be one of the most creative approaches to EV charging yet.
But this isn’t your average Supercharger site. It features a retro-futuristic, 24-hour diner and an outdoor movie theater, blending the charm of the 1980s with the tech-forward vibe of the 2020s.
Tesla hacker Greentheonly managed to spot some new evidence of changes within Tesla’s 2025.8.6 software build, which includes a new modal for “Charger Diner Controls”. While there isn’t anything to activate this new modal just yet, it is an indication of how Tesla intends to integrate the experience right into each and every Tesla.
The text in the modal reads: “Plug in, place your order, recharge” - which means that once you arrive and are plugged in, you’ll be able to place your order - and likely pay through Tesla’s payment system. It seems like this will all be done through either the Tesla app or the vehicle’s tocuh screen. No need to fumble with a separate app or pull out your wallet.
This is definitely a level of integration you just can’t have anywhere else - and just like any other Supercharger site, the Tesla Diner will appear as a suggested site for charging when you’re navigating or looking around the Hollywood area.
This is our best look yet at the two 45-foot LED screens at @Tesla's upcoming Hollywood diner and Supercharger.
We can also see the second Supercharger lot on the left with solar canopies. This will be one of the largest Supercharging spots in North America. pic.twitter.com/aWUe67M5vw
Those two absolutely gigantic 45-foot LED screens have now been turned on for the first time, meaning that Tesla is likely close to opening the Supercharger site. The screens were spotted displaying some test patterns, as well as some Tesla-themed content. It really brings the construction site to life - and it's the clearest sign that the Diner is well on its way to completion.
We’re hoping that this first Tesla Diner sees plenty of success - and that Tesla begins opening more of these types of facilities throughout North America, and eventually globally. Given Tesla’s penchant for unique Superchargers, we imagine this could truly be the case one day.
As Tesla continues to push the capabilities of its hardware as it prepares for autonomy with FSD Unsupervised, there has been a distinct divergence in features between HW4-equipped vehicles on FSD V13, and HW3-equipped vehicles on FSD V12.6.
There are definitely reasons for this, and Tesla hacker Greentheonly, over on X, went into great detail on some of the reasons why this divergence has continued and is likely to continue.
If you’re interested in some background, we recommend the following articles. Although they’re not necessary, you may enjoy reading them before diving right in if you enjoy this topic.
Back in the summer of 2024, we reported that Tesla’s HW4 had yet to reach its full potential, and that HW3 still had some compute to work with. However, FSD has undergone a rapid evolution - there are now fundamental differences driven by the hardware capabilities and sheer scale of the latest builds of FSD.
FSD V13’s Gargantuan Neural Networks
FSD V13 is a substantial leap for Tesla. It features substantially larger neural networks - the core brain that processes all the environmental data and makes decisions. Those networks are far larger in V13 than in V12, which results in a much smoother and human-like expereience.
Tesla’s FSD computers contain two nodes. According to Green’s analysis of FSD V13, Node B, which handles the actual end-to-end driving logic, tripled in size from 2.3 GB in V12 to a staggering 7.5 GB in V13. That’s a substantial increase, and one of the main reasons why HW3 can’t handle FSD V13. While Interestingly, Node A on HW4 remains similar in size to FSD V12, using up about 2.3 GB.
However, this massive size is also pushing the limits of HW4. While this isn’t necessarily a big problem immediately - at the end of the day, there is a limited amount of compute and ram available and model sizes will likely grow in the future. In fact, Tesla is planning to scale model sizes in the next FSD version and has already said they’ll need to optimize them, as context size is limited by on-board memory.
HW3 Limitations
Since HW3 can’t run the latest FSD models, where does this leave millions of Tesla vehicles equipped with the now-legacy FSD hardware? Are they hitting a dead end? Not exactly - Tesla has promised to replace HW3 computers with new units during the Q4 2024 Earnings Call, but only for those who have purchased FSD and only if Tesla is no longer able to update HW3 vehicles.
There’s no doubt Tesla hopes to achieve autonomy and then work backwards to make it compatible with HW3, but that’s unlikely to happen with the limited ram available on HW3.
Tesla’s AI team has continued to say that they’re still working on updating HW3 vehicles - but that they will be taking a backburner to updates for HW4 until the team can optimize the model efficiently enough to run on the smaller footprint. That means V12.6 isn’t just V13 “lite” - it is a distinctly different software branch tailored specifically for HW3’s capabilities.
Green's analysis showed that HW3 under V12.6 runs NNs totaling 1.2 GB on Node A and 3.1 GB on Node B, which is significantly smaller than the footprint of V13. Back in November, we discussed how Tesla is running a smaller and optimized FSD model on HW3, with the specific goal of achieving similar performance to V13. FSD V12.6 appears to be the current implementation of that smaller model strategy.
Green also found that of the total neural nets used for FSD, 135 are shared between the current V12.6 and FSD V13.2 releases, which is the result of Tesla’s AI team working to optimize and refine the V13 model for HW3. So some neural nets are shared between the two sets of hardware, while others are specific to HW3 or HW4.
AI4 in the Future
The fact that V13 is already stretching HW4’s limits makes us wonder about Tesla’s imminent release of AI5. Last year, Tesla mentioned that AI5 would be 18 months away - which is now about 8 months away, and potentially even sooner to help solve the autonomy problem.
At the same time, Tesla is looking to launch Unsupervised FSD in June in Austin, Texas, with presumably HW4, which would indicate that they’re confident in its capabilities.
Unless Tesla launches the Robotaxi network with AI5, we don’t believe AI5 will be a “must have” item. Undoubtedly, it will result in similar improvements to HW4 compared to HW3. However, the software needed to take advantage of the newer hardware could still be years away.
All eyes will be on Tesla’s Robotaxi network launch and the hardware required for it. For now, HW4 owners are in good hands with future updates are on the horizon, and we’re certainly excited for what’s next.
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