Two Tesla Model X cars stop as an oak falls; eight walk away

AI system

System: Tesla Autopilot driver-assistance suite with Automatic Emergency Braking, on two Model X cars
Model: Not assessed
Release: Exact release not established.
Application developer: Tesla
Role: The driver reported that the system applied emergency braking.
Configuration: Both vehicles were Tesla Model X cars, including one loan car. The installed Autopilot software was not identified.
Inputs and outputs: Not assessed
Autonomy: Not assessed
Workflow: Automatic Emergency Braking active on a Tesla Model X whose cameras and radar register an obstacle entering its path. A hazard that arrives in front of the car, here a tree falling across the carriageway, rather than onto the roof from above. A stop short of the point where the trunk lands, leaving the bonnet rather than the cabin to take the impact.
Human oversight: Not assessed
Relation to AI: By Laurence Sanderson's account his car was on Autopilot and the emergency braking stopped it so the trunk hit the bonnet rather than the cabin. Josh Whitelock said he was not sure whether his loan car's automatic brakes were enabled and credited its other safety features. No Tesla data, police finding or engineering assessment of whether either system braked, or whether the drivers would have stopped in time themselves, is reported. Elon Musk's reply, “Glad you're all ok”, acknowledges the outcome, not the mechanism.
AI contribution: Not assessed

Benefits

Outcome identifiers: Not assessed
Benefit: eight occupants walked away
Category: Increased Product Safety
Status: Not assessed
Beneficiary groups: People.
Beneficiaries: Not assessed
Reach: Not assessed
Distribution and access: Not assessed
Duration: Not assessed
Expected?: Yes
Costs and harms: Not assessed

Measurement

Studies: Not assessed
Study design: Not assessed
Measurement: Not assessed
Setting and sample: Not assessed
Measures: eight occupants walked away
Comparison: Not assessed
Results: eight occupants walked away
Additional value from AI: Not assessed
Limitations: Not assessed
Denominators: Not assessed
Materials for replication: Not assessed

Money

Kind of value: Not assessed
Amount: Not assessed
Currency and prices: Not assessed
Period and unit: Not assessed
Realization: Not assessed
Recipients and payers: Not assessed
Gross or net: Not assessed
Included costs: Not assessed
Comparison: Not assessed
Method: Not assessed
Return and payback: Not assessed

People and places

Participants: Developer: Tesla.
Jurisdictions: Benefit: Sturminster Marshall, United Kingdom. Developer: United States.
Ownership and control: Not assessed
Dependencies: Not assessed
Cross-border connections: Not assessed
Geopolitical implications: Not assessed

Follow-up

Conditions for replication: The system has time to detect and brake, which Sanderson put at about a second. The vehicle's structure withstands the part of the impact that still lands. Whitelock credited the car's other safety features. Occupants are belted. The Whitelock passengers were sore from the seatbelts.
Replication attempts: Not assessed
Later findings: Later coverage on 19 February 2020 only added Elon Musk's reply that he was glad everyone was OK; both cars were written off and no further development was reported.
Availability: Not assessed
Institutional decision: Not assessed
Grounds: Not assessed
Action and result: Not assessed
Success criterion: Not assessed

Evidence

Source numbers: AIBD-0108-source-0001–0008
Citations: Numbered references below.
Language: Not assessed
Source relationships: Independent, Beneficiary
Original evidence: Not assessed
Access and versions: Not assessed
Supported findings: Not assessed
Evidence links: Not assessed
Evidence strength: Not assessed
Missing evidence: Not assessed

Grades

Assessed benefits: People.
Depth: People: 3.
Reasons: People: A 400-year-old oak struck two cars at the bonnet. Eight people walked away with, at worst, two black eyes, a bump on the head and bruising. Both drivers and the Mirror call it life-saving. But that rests on the drivers' accounts, no telemetry or official assessment is reported, and the second driver was unsure the brakes were enabled.
Observed or intended: Not assessed
Rubric: Not assessed
Assessor and date: Not assessed
Alternative assessments: Not assessed
Fill: Independently reported

Entry details

Kind: Not assessed
Related entries: Not assessed
Field: Road vehicle crash avoidance. Automotive.
Purpose: Tesla's Autopilot hardware and software provide driver assistance and active safety features including Automatic Emergency Braking. It detects obstacles the car may hit and applies the brakes. Stopping short of a falling tree is that intended use as the drivers describe it.
Dates: Date basis unassessed: 2020 (precision unassessed). Updated: 21 October 2026.
Stage: Not assessed
Version: SHA-256: 711695c7ca3f…

References

Other identifiers: oecd_aim: 2020-02-18-956e.
Category mappings: Not assessed
Brief: Not assessed
Revisions: 5 revisions. Latest: 21 October 2026.

Sources

News report Independent author

Rudd A (2020). Tesla Autopilot saves family's lives after tree crushes car in Storm Dennis. Daily Mirror, 17 February 2020 (exclusive).
News report Independent author

Bournemouth Echo (2020). 'Miracle' as falling tree narrowly misses two Teslas - because the cars have automatic emergency brakes. Bournemouth Echo, 18 February 2020.
News report Independent author

Bournemouth Echo (2020). 'My life flashed before my eyes': Driver of second Tesla crushed by falling tree describes lucky escape. Bournemouth Echo, 19 February 2020.
News report Independent author

Gratton J (2020). Families escape after Tesla Model X's automatic brakes stopped a falling tree from crushing them during Storm Dennis. The Sun, 17 February 2020.
News report Independent author

Rudd A (2020). Elon Musk 'glad everyone is ok' after Tesla Autopilot saves 8 lives in Storm Dennis. Daily Mirror, 19 February 2020.
News report Independent author

La Vanguardia (2020). El Autopilot de Tesla salva la vida a 8 personas de la tormenta Dennis. La Vanguardia, 19 February 2020, citing the Mirror; one of the four Spanish-language sources cited by the OECD Monitor.
News report Independent author

RAC (2020). Tesla Model X's automatic brakes just saved two families from a falling tree during Storm Dennis. RAC Drive news, undated on the page; Google News lists 19 February 2020.
Other Beneficiary

Sanderson L (@sterlingandlaw) (2020). Tweet to @elonmusk and @Tesla with two photographs of the crushed car, 15 February 2020, 23:14 UTC; text retrieved through the fxtwitter API.