Tesla’s long-running push to bring Full Self-Driving (Supervised) more broadly to Europe has run into a fresh dispute over something deceptively simple: how fast the car is allowed to go. On September 29, the European Transport Safety Council warned EU governments about a speed-offset feature that can let the system’s maximum speed rise as much as 50% above the speed limit detected by the vehicle.
The concern lands as European regulators weigh whether national approvals should expand into broader EU acceptance. Tesla argues its supervised system can improve safety, while regulators and road-safety groups are focusing on whether its behaviour fits existing rules and whether drivers can realistically supervise it when the software itself may select or display higher speeds.
What the 50% Figure Actually Means
The warning centres on a configurable “speed offset” rather than an allegation that every Tesla running FSD automatically drives 50% above the law. Tesla’s European owner documentation describes the setting as a fixed percentage added to the currently detected speed limit. ETSC says the proposed European configuration can allow that offset to reach 50%, making the function one of the most disputed pieces of the approval package.
That distinction matters. A 50% ceiling would turn a detected 30 km/h limit into a maximum setting of 45 km/h, while 50 km/h could become 75 km/h. Those numbers do not mean the car will constantly travel at the higher figure; traffic, road geometry and system behaviour can still keep actual speed lower. The regulatory question is whether an assisted-driving system should be permitted to maintain a default maximum above the limit it has detected, especially when the driver may come to rely on the software’s judgement.
Why UN Regulation No. 171 Is at the Centre of the Dispute
ETSC’s objection is rooted in UN Regulation No. 171, the international framework covering Driver Control Assistance Systems. The rule entered into force in September 2024 and applies to systems that can continuously assist with both steering and speed while leaving the human driver responsible. UNECE explicitly places this category at SAE Level 2: the system can perform substantial parts of the driving task, but the driver must keep monitoring the road and be ready to intervene.
According to ETSC, Tesla’s speed-offset function conflicts with the regulation’s treatment of driver-set maximum speed because it can preserve an above-limit default. The group also says the Dutch approval exemptions obtained for FSD did not include an exemption for that function. That is an important legal nuance: ETSC is making an interpretation and recommendation to regulators, not announcing a court ruling. EU authorities and national approval bodies still have to decide how the function fits within the type-approval framework.
FSD Remains a Supervised Level 2 System
Despite the name, FSD Supervised is not classified in Europe as a self-driving system that relieves the person behind the wheel of responsibility. Dutch regulator RDW calls it an advanced driver-assistance system and says the driver must remain in control. Tesla’s own European manual uses similarly direct language, warning that the driver is responsible for vehicle speed at all times and must be prepared to take over immediately when the system behaves unexpectedly.
That creates a difficult human-factors balance. The software can steer, accelerate, brake, negotiate intersections and perform other complex manoeuvres, yet the human is expected to supervise continuously. Academic research on Level 2 automation has found that drivers can shift visual attention away from the forward roadway more often when partial automation is active. A 2024 on-road study involving 30 drivers found more attention directed toward the vehicle touchscreen and less toward the road during partially automated driving, reinforcing why regulators scrutinize how much judgement a supervised system should exercise on its own.
The Netherlands Opened the Door in April
The Netherlands became the pivotal gateway for Tesla’s European expansion in April 2026. RDW granted FSD Supervised a European type approval with provisional validity in the Netherlands after more than a year and a half of testing. The authority said the system could be used on Dutch roads while a process continued that might eventually extend acceptance across the European Union. RDW repeatedly emphasized that the technology remains driver assistance, not autonomy.
In June, RDW disclosed more detail about its review. It said testing exceeded 3,000 hours, included more than 1,000 test runs and drew on 1.8 million kilometres of European FSD driving data. The regulator also said nearly 40,000 Teslas had covered about 24 million kilometres in the Netherlands after approval without what it called relevant incidents. Those figures form an important counterweight to the criticism: the Dutch authority says it independently tested the system rather than simply accepting Tesla’s safety claims.
Belgian Testing Added a Real-World Warning
The speed debate intensified after a Belgian road-safety group tested FSD in the types of streets where modest speed differences can matter most. Johanna.be said its July testing covered roughly 400 kilometres over three days and focused heavily on 30 km/h zones, residential shared streets and cycle streets. In Brussels, the group reported that FSD exceeded the legal limit in 55% of the 30 km/h segments it examined, averaging 44 km/h when speeding occurred.
The study also found that the vehicle often displayed a 50 km/h limit even when the applicable limit was 30 km/h. In 20 km/h home zones, FSD exceeded the limit in 42% of tested locations, while testers also documented attempts to overtake cyclists on streets where Belgian rules prohibited the manoeuvre. The group did note a positive pattern: FSD generally behaved cautiously and courteously around pedestrians and cyclists. Its conclusion, however, was that those strengths did not erase repeated compliance failures.
Speed Detection and Speed Offset Are Different Problems
Two separate speed problems are being discussed, and they should not be conflated. The first is the policy choice built into the speed-offset feature: once the car has determined a limit, the driver may be able to configure a higher maximum. The second is perception or interpretation: the vehicle can sometimes display or act on a speed limit that does not match the legally applicable one. Either problem can produce speeding, but the underlying cause is different.
The Belgian test is useful because it exposed the second issue alongside the first debate. Johanna.be reported cases where the car encountered a 30 km/h zone yet subsequently showed the supervising driver a 50 km/h limit. That creates a human-factors problem even before any deliberate offset is applied, because the screen itself can influence what the driver believes is permitted. For regulators, reliable limit detection and rules governing allowable offsets therefore form two linked safeguards rather than one single technical question.
Why a Few Extra Kilometres per Hour Matter
European regulators are especially sensitive to speed because small increases can sharply change crash severity. The European Commission estimates that excessive or inappropriate speed is directly involved in about 30% of fatal road crashes. The World Health Organization likewise says every 1% increase in mean speed is associated with roughly a 4% increase in fatal-crash risk and a 3% increase in serious-crash risk.
Those population-level figures should not be read as a direct prediction of what Tesla FSD will do on any individual trip. They explain why a software setting that normalizes driving above a detected limit attracts scrutiny. The issue becomes even more consequential on urban streets shared with people walking or cycling, where impact speed strongly affects survival. Europe has spent years expanding intelligent-speed-assistance requirements and lower urban speed limits, so a driver-assistance feature that can retain a sizable positive offset runs against the direction of many road-safety policies, even if the driver remains legally responsible.
Tesla Says Traffic Context Matters
Tesla’s case is that safe driving cannot always be reduced to blindly matching a number on a sign. On its FSD evidence dashboard, the company published an analysis of 708 randomly selected European engineering-drive samples in which the system exceeded its own detected limit while other vehicles were travelling nearby. Tesla said FSD was at or below the median speed of surrounding traffic in 98% of high-speed cases and did not exceed the fastest nearby vehicle in 99.9% of cases.
That evidence supports Tesla’s argument that contextual speed selection can sometimes reduce speed differences within traffic. But it also has limits. The dataset was produced by Tesla, and the European FSD examples came from engineering vehicles operated by trained personnel rather than a broad population of ordinary customers. Matching surrounding traffic also does not automatically make an above-limit speed lawful. ETSC has therefore asked regulators to reject not only the fixed speed offset but also a separate function that can adjust maximum speed based on surrounding traffic.
Europe Is Still Split on Approval
Europe’s regulators are not speaking with one voice. The Netherlands approved FSD Supervised in April, and several other countries have since allowed or recognized deployments, while Sweden, France and the Czech Republic have raised concerns about speed-related behaviour. ETSC has been urging a precautionary approach as national permissions accumulate before a definitive bloc-wide decision is made. That split helps explain why one software function has become a test of how Europe wants to regulate increasingly capable Level 2 systems.
The timetable has also shifted. A broader EU decision had previously been expected in October, but Reuters reported on September 29 that an EU-wide vote is now unlikely before December. That delay currently gives regulators more time to examine the offset dispute, the Belgian testing and Tesla’s safety evidence. It also leaves customers in an uneven position: availability can depend on national recognition while the larger European approval question remains unsettled.
The Next Decision Could Set a Broader Precedent
The immediate debate is narrower than the biggest claims made by either side. ETSC is not arguing that every automated manoeuvre performed by FSD is unsafe, and the Dutch regulator has already concluded that the supervised system, when properly used, can make a positive contribution to road safety. Tesla, meanwhile, does not describe the European product as autonomous and explicitly instructs drivers to remain responsible for speed and control.
What regulators now have to resolve is whether those safeguards are compatible with software that can set or select a speed above the detected legal limit. ETSC wants the speed-offset function and the separate traffic-flow speed feature rejected, while Tesla argues that contextual behaviour can make driving safer and more natural. The eventual decision could influence much more than one Tesla setting. It may help define how Europe treats future Level 2 systems that increasingly make human-like choices while still assigning legal responsibility to the person in the driver’s seat.
