# The Self-Driving Collision

Canonical: https://www.barprepplay.com/essay-playbooks/torts-mega/
Byline: BarPrepPlay
Last reviewed: March 12, 2026
Difficulty: Hard
Subjects: Torts, Products Liability, Negligence, Damages

## Target topics

- Negligence
- Respondeat Superior
- Products Liability
- Design Defect
- Failure to Warn
- Comparative Fault
- Joint and Several Liability
- Punitive Damages

## Fact pattern

Harper owns a Lumen S1, a semi-autonomous SUV manufactured by Corvus Motors. The vehicle's "Assist" mode handles highway driving but requires the driver to "remain available to take control at any time." The owner's manual repeats this warning; a chime sounds every 90 seconds if the driver looks away.

At 2:14 pm on a Tuesday, Harper engaged Assist mode on Interstate 41. She opened her laptop on the steering column and began replying to work email. Traffic was moderate.

Meanwhile, Dale, a long-haul driver for FastFreight LLC, was hauling construction equipment in the adjacent lane. FastFreight's driver handbook says "secure cargo when practical." Dale had bungee-corded a seven-foot metal extension ladder to the side of his flatbed. The ladder came loose and fell into Harper's lane.

The Lumen S1's LIDAR system failed to register the ladder because its forward cameras had been miscalibrated at the factory. An internal Corvus engineering memo from eight months earlier noted the miscalibration affected roughly 2% of S1 vehicles built in the prior quarter and recommended "a service-bulletin notification rather than a full recall to contain reputational risk." No recall was issued; Harper's S1 was one of the affected vehicles, and she received no notice.

The Lumen struck the ladder at 62 mph, veered into the right lane, and collided with a sedan driven by Pam, who was returning home from work. Pam suffered a fractured pelvis and concussion: $180,000 in medical costs, $60,000 in lost wages, and severe ongoing pain. Harper suffered airbag-related injuries totaling $40,000. Dale was unhurt.

Pam sues Harper, Corvus Motors, Dale, and FastFreight. Harper also brings a claim against Corvus. The jurisdiction uses modified comparative fault with a 51% bar and retains joint-and-several liability for indivisible injuries.

## Scored issues to spot

- **Dale's Negligence in Securing Cargo** (Torts, 10 pts): Bungee-cording a heavy ladder to the side of a flatbed at highway speeds breaches the ordinary duty of reasonable care. Causation (both but-for and proximate) is clear — a foreseeable risk of improperly secured cargo is exactly what occurred.
- **FastFreight Vicariously Liable for Dale** (Torts, 10 pts): Dale was acting within the scope of employment when he secured and hauled the load. FastFreight is liable under respondeat superior. The handbook's weak "when practical" language does not immunize the employer and may itself evidence negligent supervision.
- **Design or Manufacturing Defect in the LIDAR System** (Torts, 15 pts): Corvus is strictly liable if the LIDAR was defective when it left the factory and caused foreseeable harm. Miscalibrated cameras affecting 2% of a run is more naturally a manufacturing defect (deviation from intended design) than a design defect. Risk-utility analysis would also expose the system if a feasible alternative existed.
- **Failure to Warn / Failure to Recall** (Torts, 15 pts): The internal memo establishes Corvus had actual knowledge of the camera miscalibration. Choosing a service bulletin over a recall to "contain reputational risk" is strong evidence of a conscious failure to warn. Post-sale duty to warn applies because the risk was known before Harper's accident.
- **Harper's Negligent Use of Assist Mode** (Torts, 10 pts): The manual and the 90-second chime put Harper on notice that she must remain available. Opening a laptop and replying to email breaches the ordinary duty of care and is also a misuse of the Assist feature. Whether misuse is foreseeable affects only the products claim, not Harper's own negligence to Pam.
- **Concurrent Causation — Indivisible Harm to Pam** (Torts, 10 pts): Pam's injuries flow from a single collision caused by multiple concurrent negligent acts: Dale's dropped ladder, Corvus's defective LIDAR, and Harper's inattention. Each is a but-for cause; the harm is indivisible; joint-and-several liability applies in this jurisdiction for indivisible injuries.
- **Comparative Fault Apportionment** (Torts, 10 pts): Pam bears no fault and recovers fully subject to apportionment among defendants. Harper's own claim against Corvus is reduced by her share of fault; if Harper's share exceeds 50%, the 51% bar eliminates her recovery. Defendants may seek contribution from one another in proportion to fault.
- **Punitive Damages Against Corvus** (Torts, 10 pts): The internal memo recommending a service bulletin to "contain reputational risk" supports a finding of conscious disregard for safety. This is the paradigmatic fact pattern for punitives — a manufacturer that knew of a defect, calculated the PR cost against the safety risk, and chose the PR side.
- **Harper's Own Claim Against Corvus** (Torts, 5 pts): Harper has a direct products claim for her own airbag injuries. Her negligent use reduces her recovery under comparative fault. If finder concludes Harper's fault ≤50%, she recovers her $40,000 reduced by her percentage; if >50%, she recovers nothing under the 51% bar.
- **Compensatory Damage Categories for Pam** (Torts, 5 pts): Pam recovers economic damages ($240,000 medical + wages) and non-economic pain-and-suffering damages. Mitigation duty applies to future wage loss. Collateral-source and insurance offsets are jurisdiction-dependent.

## Model answer

**1. DALE WAS NEGLIGENT**
Every driver owes a duty of reasonable care to others on the road. Dale breached that duty by securing a seven-foot metal ladder to the side of a flatbed with bungee cords at highway speeds. But-for causation is met: had the ladder been properly secured, the Lumen would not have struck it. Proximate causation is met because the foreseeable risk of inadequately secured highway cargo is exactly the kind of collision that occurred.

**2. FASTFREIGHT IS VICARIOUSLY LIABLE**
Dale was hauling cargo for his employer when the ladder fell. That is squarely within the scope of his employment. Under respondeat superior, FastFreight is vicariously liable for Dale's negligence. The handbook's weak instruction to "secure cargo when practical" does not immunize the employer; if anything, it supports an independent negligent-supervision theory.

**3. THE LIDAR WAS DEFECTIVE (MANUFACTURING DEFECT IS THE CLEANER THEORY)**
Corvus is strictly liable for a product defect that caused foreseeable harm. Miscalibration affecting 2% of a specific quarter's build is a classic manufacturing-defect pattern: the product deviated from its intended design. Design-defect analysis could also succeed if a cost-effective alternative design existed (e.g., redundant sensors, factory calibration verification), but the 2% figure is the fingerprint of a manufacturing deviation. The defect left the factory and caused Pam's and Harper's injuries.

**4. FAILURE TO WARN / DUTY TO RECALL**
The internal Corvus memo is damning. Eight months before the accident, Corvus knew the LIDAR calibration was compromised in a subset of vehicles and that the compromise could defeat obstacle detection. Choosing a "service-bulletin notification rather than a full recall to contain reputational risk" is both a failure-to-warn and, in jurisdictions recognizing it, a failure-to-recall. The post-sale duty to warn is triggered when the manufacturer learns of a defect after sale, which is precisely what happened here. Harper received no notice.

**5. HARPER WAS NEGLIGENT IN USING ASSIST MODE**
The Assist mode requires the driver to "remain available to take control." The manual warned it; a 90-second chime reinforced it. Opening a laptop and replying to work email is a breach of ordinary care and a misuse of the feature. This is relevant both to Pam's claim (as a concurrent cause) and to Harper's own claim against Corvus (comparative-fault reduction or bar). Under strict products liability, a user's foreseeable misuse does not automatically defeat the claim, but it does reduce recovery.

**6. INDIVISIBLE HARM TO PAM — JOINT AND SEVERAL LIABILITY**
Pam suffered a single collision causing a single set of injuries. Each defendant's negligence was a but-for cause. The harm is indivisible. In this jurisdiction, joint-and-several liability applies to indivisible injuries, so Pam may collect her full damages from any one defendant, which then may seek contribution from the others in proportion to fault.

**7. COMPARATIVE FAULT APPORTIONMENT**
Pam bears no fault and recovers fully. A reasonable apportionment among defendants might be: Corvus 50% (primary cause via the concealed LIDAR defect), Dale/FastFreight 30% (the dropped ladder), Harper 20% (inattention). Harper's own claim against Corvus for her airbag injuries is reduced by her 20% fault: she recovers $32,000 of her $40,000. If a jury assigned her more than 50%, the modified-comparative 51% bar would eliminate her recovery.

**8. PUNITIVE DAMAGES AGAINST CORVUS**
This is the paradigmatic fact pattern for punitives. The internal memo shows Corvus: (i) actually knew of the defect, (ii) quantified the affected population, and (iii) consciously chose a PR-protective path over a safety-protective one. That is conscious disregard for a known risk of serious harm. Most jurisdictions recognize punitives for that level of corporate recklessness. Constitutional limits (BMW v. Gore, State Farm) cap the ratio, but a single-digit multiplier of Pam's compensatory damages is typically permissible.

**9. HARPER'S DAMAGES**
Harper's $40,000 airbag claim is a direct products claim. If her fault is ≤50%, she recovers proportionally; if >50%, the 51% bar eliminates her claim. She has no negligence claim against Dale and FastFreight (her own lane-departure was caused by the defective LIDAR, not Dale, though Dale's ladder started the chain).

**10. PAM'S DAMAGES**
Pam's economic damages include $180,000 medical plus $60,000 lost wages. Non-economic pain-and-suffering damages are recoverable; the fractured pelvis and ongoing pain will support a substantial award. Pam has a duty to mitigate future wage loss with reasonable job-search effort. Collateral-source and insurance offsets depend on local rules.

**KEY POINT:** The call usually asks which defendants are liable and for what. The strongest theories are (a) products liability (manufacturing defect + failure to warn) against Corvus, (b) negligence + respondeat superior against Dale/FastFreight, and (c) concurrent-cause joint-and-several liability exposing each defendant to Pam's full damages subject to contribution. Harper is a defendant to Pam and a comparative-fault-reduced plaintiff against Corvus.

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