Should Tesla Adopt a 'FSD' Light To Let Others Know Autopilot Is Active?

January 27, 2024

By Kevin Armstrong

Turquoise Lights Could Indicate an Autonomous Driving Vehicle

Not a Tesla App

Mercedes-Benz's introduction of turquoise Automated Driving Marker Lights for its DRIVE PILOT system, following the SAE J3134 Recommended Practice, marks another step in the evolution of automated driving technology. This move raises the question: Should Tesla and all automakers developing autonomous driving features follow Mercedes' lead? Considering the US's lack of a national regulatory framework and the implications for the future of autonomous driving, this topic will get more significant as technology evolves.

Establishing a Common Language for Automated Vehicles

Mercedes-Benz’s initiative underscores the importance of a standardized visual communication method for automated vehicles. Such standardization would help inform all drivers and pedestrians when vehicles operate autonomously, improving road safety and predictability. If Tesla adopted this system, it could contribute significantly to establishing a universal language for automated cars, fostering a safer and more efficient integration into the existing traffic ecosystem.

There is still a long road ahead to fully autonomous driving, mainly because the technology is dealing with human behavior, which, at times, can be unpredictable. But this kind of signal could alert other FSD vehicles to travel together, lessening the risk of human error during those long road trips.

Mercedes' turquoise light

Not a Tesla App

Risk of Misinterpretation

However, a significant concern for Tesla in adopting such a strategy is the potential for increased negative attention from EV critics. The move, known as 'rolling coal,' where diesel truck drivers intentionally emit large amounts of exhaust fumes near EVs, highlights tensions between traditional vehicle enthusiasts and the EV community. Introducing conspicuous turquoise lights might exacerbate this issue, making Tesla vehicles more of a target for such antagonistic behavior.

While using ADS marker lights offers clear benefits, concerns have been raised about their potential to attract intentional interference from other road users. There is also the risk of misinterpretation of these signals, which could lead to safety hazards. Tesla would need to consider these aspects carefully, ensuring that any implementation of such technology is accompanied by widespread public education and awareness campaigns to mitigate these risks.

There could also be an added risk of being a target on the road. If a pedestrian or vehicle knows that a vehicle is autonomous, they may take additional risks in passing or crossing in front of the vehicle, thinking that the vehicle will yield or stop for them.

Navigating the Regulatory Maze and Costs

Implementing turquoise lights as an indicator for full self-driving mode involves navigating complex legal and regulatory landscapes. Currently, there is no nationwide framework in the US for such technology. Mercedes only has approval for the new light in California and Nevada. Standardization requires extensive discussions and adaptations to the national road traffic and regulatory frameworks. Tesla would need to engage in these conversations actively and adapt to evolving standards, which could be resource-intensive.

However, Tesla is a leader in this sector and has experience changing opinions and getting support from competitors. Most automakers have announced plans to adopt Tesla’s NACS charging system, making the company’s charging technology the winner in North America. Others will notice and likely follow if Tesla considers a new light for its FSD.

Additionally, integrating these lights into Tesla's existing vehicle designs might require significant engineering adjustments, adding to the cost and complexity of their vehicles. Who would pay for the retrofit of the current fleet or would it only apply to new vehicles?

Enhancing Accessibility and Safety for Persons with Disabilities

One of the critical considerations for automated driving systems is their potential to provide mobility solutions for individuals who cannot obtain a driver's license due to various impairments. Clear visual signals like turquoise lights could make these technologies more accessible and understandable to all road users, including those with disabilities. By adopting such features, Tesla would be taking a step forward in creating inclusive and universally accessible transportation solutions.

The decision for Tesla to adopt turquoise lights similar to Mercedes-Benz for indicating full self-driving mode is multifaceted, involving considerations of safety, inclusivity, regulatory compliance, and public perception. As the landscape of automated driving continues to evolve, industry leaders like Tesla must navigate these challenges thoughtfully, contributing to a future where autonomous vehicles are seamlessly integrated into our daily lives, enhancing accessibility and safety for all road users.

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Tesla LFP Batteries Can Now Be Warmed up While Supercharging Using Innovative Feature

January 14, 2025

By Karan Singh

Not a Tesla App

Tesla’s been on a roll with Supercharger improvements lately, from the 325kW charging update for the Cybertruck, to 500kW with V4 Superchargers coming next year. While those improvements have been limited to the Cybertruck, Tesla didn’t put all their focus on their new flagship vehicle, but looked at their more affordable vehicles as well.

LFP Battery Heating

Tesla’s Superchargers can now heat LFP Batteries - those that are in the Model 3 and Model Y Rear Wheel Drive variants. This applies to Long Range and Standard Range models, which saw a limited run. This is another update included as part of the 2024 Tesla Holiday Update - which really arrived with a lot of unannounced new features and capabilities.

The change is pretty interesting - Superchargers of the V3 and V4 variety can now pre-heat batteries for Model 3 and Model Y vehicles equipped with LFP battery packs. That means those vehicles are able to get back on the road faster when it's extremely cold. Of course, Tesla still advises you to precondition before you arrive, saving drivers time and money.

Max de Zegher, Tesla’s Director of Charging, also commented on the new feature. Essentially, Tesla is inducing an AC (alternating) ripple current through the battery to warm it up. Keep in mind that Superchargers are DC charging. That means it is possible to get a cold-soaked LFP vehicle on the road 4x faster than before, assuming that it didn’t precondition at all and that it is in the worst-case scenario (below 0ºF).

In essence, Tesla is using some engineering magic to turn the circuits inside the LFP battery into an electric heater - and powering that heater through the Supercharger. An AC ripple current is a small oscillation in the DC charging current that generates heat through electrical resistance, warming up the battery. Those ripples are a byproduct of converting AC to DC and back - so Tesla is using the onboard charger to induce those ripples to warm up the battery. Definitely an innovative technique that’s really only possible with the versatility of the NACS connector.

We’re hoping Tesla can implement this across their full lineup of vehicles, but we’ll have to wait and see how it is trialed across LFP vehicles first and if it is even possible on vehicles with 2170 or 4680 battery packs.

Tesla Included FSD V12.6.1 and V13.2.4 in the Same Update: What Caused This and What It Means

January 13, 2025

By Karan Singh

Not a Tesla App

Tesla launched two FSD updates simultaneously on Saturday night, and what’s most interesting is that they arrived on the same software version. We’ll dig into that a little later, but for now, there’s good news for everyone. For Hardware 3 owners, FSD V12.6.1 is launching to all vehicles, including the Model 3 and Model Y. For AI4 owners, FSD V13.2.4 is launching, starting with the Cybertruck.

FSD V13.2.4

A new V13 build is now rolling out to the Cybertruck and is expected to arrive for the rest of the AI4 fleet soon. However, this build seems to be focused on bug fixes. There are no changes to the release notes for the Cybertruck with this release, and it’s unlikely to feature any changes when it arrives on other vehicles.

While this update focuses on bug fixes, Tesla’s already working on bigger features for FSD V13.3, which we have already confirmed to include improvements to highway following and speed control.

FSD V12.6.1

FSD V12.6.1 builds upon V12.6, which is the latest FSD version for HW3 vehicles. While FSD V12.6 was only released for the redesigned Model S and Model X with HW3, FSD V12.6.1 is adding support for the Model 3 and Model Y.

While this is only a bug-fix release for users coming from FSD V12.6, it includes massive improvements for anyone coming from an older FSD version. Two of the biggest changes are the new end-to-end highway stack that now utilizes FSD V12 for highway driving and a redesigned controller that allows FSD to drive “V13” smooth.

It also adds speed profiles, earlier lane changes, and more. You can read our in-depth look at all the changes in FSD V12.6.

Same Update, Multiple FSD Builds

What’s interesting about this software version is that it “includes" two FSD updates, V12.6.1 for HW3 and V13.2.4 for HW4 vehicles. While this is interesting, it’s less special when you understand what’s happening under the hood.

The vehicle’s firmware and Autopilot firmware are actually completely separate. While a vehicle downloading a firmware update may look like a singular process, it’s actually performing several functions during this period. First, it downloads the vehicle’s firmware. Upon unpacking the update, it’s instructed which Autopilot/FSD firmware should be downloaded.

While the FSD firmware is separate, the vehicle can’t download any FSD update. The FSD version is hard-coded in the vehicle’s firmware that was just downloaded. This helps Tesla keep the infotainment and Autopilot firmware tightly coupled, leading to fewer issues.

What we’re seeing here is that HW3 vehicles are being told to download one FSD version, while HW4 vehicles are being told to download a different version.

While this is the first time Tesla has had two FSD versions tied to the same vehicle software version, the process hasn’t actually changed, and what we’re seeing won’t lead to faster FSD updates or the ability to download FSD separately. What we’re seeing is the direct result of the divergence of HW3 and HW4.

While HW3/4 remained basically on the same FSD version until recently, it is now necessary to deploy different versions for the two platforms. We expect this to be the norm going forward, where HW3 will be on a much different version of FSD than HW4. While each update may not include two different FSD versions going forward, we may see it occasionally, depending on which features Autopilot is dependent on.

Thanks to Greentheonly for helping us understand what happened with this release and for the insight into Tesla’s processes.