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Short answer: Tesla Full Self-Driving (Supervised) is not a self-driving service and cannot make a city trip safe without an attentive driver. It is a partial-automation driver-assistance system. You must watch the road continuously, remain responsible for the vehicle and be ready to steer, brake or disengage it immediately. The National Highway Traffic Safety Administration (NHTSA) says, “Every vehicle currently for sale in the United States requires the full attention of the driver at all times for safe operation.”
Tesla publishes collision comparisons for vehicles using FSD, but those figures are manufacturer-reported and depend on definitions and assumptions that do not prove the system is safer on every urban street, in every weather condition or with every software build. Government inquiries and crash investigations add important context, but an inquiry or preliminary report is not automatically a finding that FSD is defective.
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What “Full Self-Driving (Supervised)” actually means
Tesla’s current name puts the critical limitation in parentheses: Supervised. NHTSA describes the system as partial automation and includes “Autosteer on City Streets” among the functions covered by its information request. Partial automation can control some steering, acceleration and braking in defined circumstances, but it does not transfer legal or practical responsibility for the trip from the driver to the car.
NHTSA’s general automated-vehicle guidance says there is no fully automated vehicle available for sale in the United States and that currently available vehicles require the driver’s full attention. That is agency guidance about the consumer market, not an endorsement or a software-specific test result. Read it together with Tesla’s own instructions: FSD (Supervised) is an aid for an engaged driver, not permission to become a passenger.
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- Keep your eyes on the roadway and the surrounding traffic.
- Stay able to take over instantly if the system hesitates, chooses an unsafe path or gives a takeover prompt.
- Remain responsible for speed, following distance, lane choice, right-of-way and every other driving decision.
- Never use a phone, watch a video, sleep or perform another task that prevents immediate intervention.
If you cannot meet those conditions, do not activate the feature. No steering-wheel device, accessory or workaround can substitute for attention.
Source: NHTSA Automated Vehicle Safety.
Why city streets require especially careful supervision
Urban driving combines moving vehicles, pedestrians, cyclists, parked cars, turning traffic, traffic signals, lane changes, construction and unusual road layouts. The system must classify objects and predict a usable path while the scene changes quickly. NHTSA’s 2024 information request specifically examined how Tesla FSD Beta and FSD (Supervised) respond when visibility is reduced, describing conditions that can inhibit classification of objects or the path ahead.
Reduced visibility can occur in rain, fog, glare, darkness, spray, dust or when another vehicle blocks part of the view. A system that appears smooth in clear daylight can have less information available in those conditions. Treat a clear display or a confident-looking maneuver as evidence that the car has detected something—not as proof that it has detected everything.
City capability also varies by location and circumstance. A route with well-marked lanes and predictable traffic is not equivalent to a temporary work zone, an unprotected turn, a narrow residential street or an intersection with an obscured pedestrian. Do not generalize performance from one drive, one street or one software update to every city trip.
What Tesla’s collision data can—and cannot—show
Tesla’s Full Self-Driving (Supervised) Vehicle Safety Report is the primary source for the company’s FSD collision-rate claims. It reports rolling 12-month metrics, is updated quarterly and displays overall FSD mileage dating from 2020 onward. Before quoting a rate or mileage figure, check the live report and put the reporting period, geography and software context beside the number.
How Tesla defines an FSD-involved collision
Tesla counts a collision as involving FSD when the feature was active at any time during the five seconds before the event. Tesla says the window is intended to allow for the time a driver may need to recognize a hazard and take over. The company does not assign fault in these collision figures. A crash can therefore appear in the FSD-involved total even when the driver, another road user or another factor may have caused it.
How the comparison baseline is built
The report compares FSD-equipped Tesla vehicles with manually driven Teslas, including vehicles with and without active-safety features. It also constructs a United States average using Federal Highway Administration mileage information and NHTSA collision datasets. Tesla acknowledges that those datasets use different reporting criteria, that assumptions are unavoidable and that the assumptions can push a comparison higher or lower.
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Government data do not provide directly comparable highway and non-highway categories, so Tesla estimates that split from the relative fractions observed in its manually driven fleet. A “non-highway” figure is therefore not a pure, independently measured city-street rate. It may include roads that differ substantially in traffic, speed, weather and design.
| Question to ask of a reported number | Why it matters |
|---|---|
| Who produced it? | Tesla’s report is manufacturer-reported; it is not an independent regulator test. |
| What counts as FSD involvement? | Tesla uses a five-second pre-crash activity window and does not determine fault. |
| What is the denominator? | Compare mileage, exposure period and vehicle population, not a raw crash count. |
| Which roads are included? | Highway and non-highway categories use estimates that are not identical to a city-only sample. |
| Which period and version apply? | Rolling 12-month results change quarterly; a past software build may not match today’s system. |
| Are the datasets comparable? | Tesla says government sources differ in criteria and can introduce bias. |
Telemetry is not a safety rate
Tesla reported 2.5 billion telemetry packages in the third quarter of 2025, excluding China. That is a measure of data volume, not the number of trips, crashes, near misses or safe miles. It cannot by itself establish how FSD performs on city streets.
Tesla also cites NHTSA’s 2023 Crash Report Sampling System finding that 71.7% of crashes were property-damage-only when explaining why collision datasets differ. That statistic describes the NHTSA dataset; it is not a Tesla FSD crash rate. Likewise, NHTSA’s figure of 39,254 people killed in motor-vehicle crashes in 2024 provides broad road-safety context, not a measure of FSD’s relative risk.
What regulators and investigators have actually said
NHTSA’s 2024 information request
On November 5, 2024, NHTSA’s Office of Defects Investigation issued an information request covering all versions of Tesla FSD Beta and FSD (Supervised) deployed in U.S. vehicles. The document, Information Request: Tesla Full Self-Driving Beta and Full Self-Driving (Supervised), PE24031, sought information about crashes in reduced-visibility conditions and the system’s ability to detect and respond to those conditions.
An information request means the agency is gathering evidence. It is not a final determination that a defect exists, and the document alone does not establish that FSD is unsafe in every setting. Check NHTSA’s current records for the present status before describing the inquiry as open, closed or resolved.
Source: NHTSA ODI information request PE24031.
The 2026 Katy, Texas crash
The National Transportation Safety Board’s preliminary account of a June 2026 fatal crash at a Texas residence reports that a 2025 Tesla Model 3 had FSD (Supervised) engaged. Electronic data indicated that, before impact, the driver overrode FSD by pressing the accelerator to 100%. The vehicle was traveling faster than 70 mph on a residential street posted at 30 mph.
The NTSB says its investigation is ongoing, and its account states, “This information is preliminary and subject to change.” NHTSA also opened a special crash investigation. The report does not establish a final probable cause, does not show that the event represents typical FSD operation and cannot be used to calculate the system’s overall city-street risk.
Source: NTSB Passenger Vehicle Collision with Residence (HWY26FH014).
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The safest decision is conditional, not a blanket yes or no. Use the feature only when you can supervise it continuously and the road environment gives you enough time and visibility to intervene. A driver who feels tired, distracted, rushed or unsure about the route should drive manually or postpone the trip.
Before activation
- Read the current vehicle instructions and understand what the on-screen FSD status means. Do not infer capability from the marketing name.
- Adjust mirrors, seat position and climate controls before moving so you are not distracted after activation.
- Confirm that you can see the roadway, intersections and vulnerable road users. If glare, fog, rain, darkness or obstruction prevents that, do not rely on automation.
- Choose a speed and following distance that leave room for a manual response. The system’s willingness to proceed is not a safety clearance.
- Tell every occupant that the driver remains responsible and that sudden intervention may be necessary.
While it is engaged
- Scan beyond the vehicle directly ahead, including sidewalks, crosswalks, driveways and adjacent lanes.
- Watch for route changes, temporary signs, emergency vehicles, cyclists and pedestrians emerging from behind parked cars or other obstructions.
- Monitor the system’s path and speed rather than assuming a correct-looking lane position means every hazard has been recognized.
- Respond immediately to a takeover request or any maneuver you do not understand. Do not wait to see whether the system corrects itself.
Taking over safely
If FSD behaves unexpectedly, take control smoothly but decisively: steer away from the hazard, brake as necessary, cancel the automation and stabilize the vehicle in a safe lane or stopping place. After a serious anomaly, stop driving until you understand what happened. Record the time, location, weather, road layout, system prompts and any dash-camera footage; those details are more useful than a general impression that the car “felt unsafe.”
How to compare FSD claims with other safety claims
No substantiated evidence here supports ranking particular FSD software versions, Tesla models or alternative driver-assistance products. If you compare reports, use the same questions for every source:
- Is the evidence manufacturer-reported, regulator-produced or an independent controlled study?
- Does the source assign fault, or merely count events associated with system activity?
- Are exposure and mileage denominators stated?
- Are urban, non-highway and highway roads defined consistently?
- What reporting period, software version, vehicle population and geography are covered?
- How are rain, darkness, glare, fog, construction and other visibility conditions represented?
- Is the government matter preliminary, an information request, an active investigation or a final finding?
A favorable fleet comparison can be informative while still failing to answer the narrower question, “What will happen on this particular city street right now?”
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Do I have to watch the road with FSD?
Yes. Continuous attention is required. FSD (Supervised) does not turn the driver into a passenger, and NHTSA says vehicles currently sold in the United States require the driver’s full attention for safe operation.
Is FSD actually self-driving?
No. In the regulatory sense relevant to a consumer vehicle, it is partial automation. The word “Supervised” is a reminder that the driver must monitor and take over.
Does Tesla’s safety report prove FSD is safer in city traffic?
No. Tesla’s report uses its own five-second involvement definition, does not assign fault, combines several comparison populations and estimates some road-category splits. It is evidence to evaluate, not independent proof of safety on every city street.
Does the NHTSA inquiry prove FSD has a defect?
No. PE24031 is an information request about reduced-visibility performance. Only a later agency action or finding could establish a regulatory conclusion.
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It documents a serious event under investigation, including reported accelerator override and speed above 70 mph. The NTSB account is preliminary and cannot establish general FSD risk or final probable cause.
Should I stop using FSD in all bad weather?
You should not rely on it when visibility or the roadway prevents you from supervising effectively. Because performance can depend on the specific scene and conditions, follow the vehicle’s warnings and use manual control whenever you cannot maintain a clear, immediate understanding of the road.
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