Car Accident and Personal Injury Claims: From the Crash to the Check

Summary. Most personal injury claims are never decided by a jury. They are decided by an adjuster reading a file, applying a fault percentage, subtracting liens, and writing a number. This article explains the machinery on both sides of that number: the elements of a negligence claim and how each is actually proved, the fault-allocation rules that vary enormously between states and can zero out a strong case, the insurance architecture that determines who pays and how much is available, and the lien and reimbursement obligations that quietly consume settlements. It covers the crash-scene and early-treatment decisions that shape a case months before a lawyer sees it, the anatomy of a policy limits demand, and when litigation is worth the delay.

A woman is rear-ended at a stoplight. The other driver apologizes at the scene, admits he was looking at his phone, and gets a ticket. Liability could not be clearer.

Eighteen months later she nets $9,400.

Nothing went wrong, exactly. The at-fault driver carried the state minimum, $25,000. The emergency room, the imaging center, and four months of physical therapy billed $31,000. Her health plan paid $14,200 of it and asserted a reimbursement right for every dollar. Her own underinsured motorist coverage was $25,000 — which, in her state, is reduced by the amount recovered from the at-fault driver, leaving nothing. The lawyer's contingency fee was a third. The remaining providers negotiated their balances down, but not to zero.

The case was worth what the insurance was worth. That is the single most important fact in personal injury practice, and it is invisible from the outside.

This article is about everything between the crash and the check: what has to be proved, who actually pays, what gets taken out, and where the leverage lives.

Part I: What a negligence claim requires

Every ordinary personal injury claim — car crash, slip and fall, dog bite, defective stairway — is built on four elements. They sound simple. Each one hides a fight.

Duty

Duty is the legal obligation to conform to a standard of conduct. For drivers it is universal and rarely contested: everyone who operates a vehicle owes other users of the road a duty of reasonable care. For property owners it is contested constantly, because the duty owed historically depended on the visitor's status — invitee, licensee, or trespasser — and many states have collapsed or modified those categories. See Premises Liability for Property Owners and Businesses for that framework.

Duty is a question of law for the court, which matters strategically: it can be resolved on a motion to dismiss or summary judgment, and it is reviewed de novo on appeal.

Breach

Breach is the failure to act as a reasonably prudent person would under the circumstances. This is the ordinary jury question, and it is proved with facts: speed, distance, phone records, the position of the vehicles, the length of the skid marks, the store's inspection log, the maintenance history.

Two doctrines let a plaintiff shortcut the proof.

Negligence per se. Where a statute or ordinance sets a standard of conduct, the plaintiff is within the class the statute protects, and the harm is of the type the statute was meant to prevent, violation of the statute establishes breach — in most states conclusively, in some as a rebuttable presumption, in a few as mere evidence. A driver who runs a red light in violation of the vehicle code has, in most jurisdictions, breached as a matter of law. The remaining fight is causation and damages.

Res ipsa loquitur. Where the injury is of a kind that ordinarily does not occur absent negligence, the instrumentality was within the defendant's exclusive control, and the plaintiff did not contribute, the jury may infer negligence without direct proof. The classic case is a barrel of flour falling from a warehouse window; the modern versions are surgical instruments left in patients, elevator free-falls, and objects departing from commercial vehicles. In Summers v. Tice, 33 Cal. 2d 80 (1948), California went further and shifted the burden of proof to two negligent hunters when only one bullet could have caused the injury — the ancestor of modern alternative-liability and market-share theories.

Causation

Causation has two parts and plaintiffs lose on the second one far more often than they expect.

Cause in fact — the "but for" test. But for the defendant's conduct, would the injury have occurred? Where two independent causes each would have sufficed, courts substitute the "substantial factor" test.

Proximate cause — the legal limit on liability, which asks whether the harm was a foreseeable consequence of the breach. This is the doctrine Palsgraf v. Long Island Railroad Co., 248 N.Y. 339 (1928), made famous: a guard pushed a passenger, the passenger dropped a package of fireworks, the explosion toppled scales at the far end of the platform, and Judge Cardozo held that the railroad owed no duty to a plaintiff outside the zone of foreseeable danger. Every first-year law student reads it; every practicing lawyer eventually meets it in the form of an insurer arguing that the second collision, the delayed surgery, or the fall in the parking lot on the way to physical therapy is not the defendant's problem.

Medical causation is the real battlefield in injury cases. A defendant rarely disputes that a crash occurred. What the defense disputes is that this crash caused this herniation in this plaintiff, who is fifty-four years old and whose MRI shows degenerative changes at three levels. The plaintiff needs a treating physician or retained expert to say, to a reasonable degree of medical probability, that the trauma caused or aggravated the condition. The defense needs a records review, prior imaging, and a biomechanical opinion that the forces involved were insufficient.

The eggshell plaintiff rule helps: a defendant takes the plaintiff as found, and is liable for the full extent of harm even if a healthier person would have walked away. But it does not eliminate the requirement that the trauma caused something. And in the modern defense playbook, aggravation of a preexisting condition is conceded narrowly and valued cheaply.

Damages

Damages are the money. They divide into:

Economic damages — medical expenses incurred and reasonably certain to be incurred, lost wages, lost earning capacity, property damage, out-of-pocket costs, household services.
Non-economic damages — pain, suffering, disfigurement, loss of enjoyment of life, mental anguish, and in many states loss of consortium for a spouse.
Punitive damages — available only for conduct beyond ordinary negligence, typically requiring recklessness, malice, or conscious disregard. Drunk driving qualifies in many states; distracted driving usually does not.

For the constitutional and evidentiary limits on damages proof, see Proving Damages in Civil Litigation.

Part II: Fault allocation — the rule that decides more cases than any other

Suppose the plaintiff is 30% at fault. What happens next depends entirely on which state the case is in, and the differences are enormous.

Pure contributory negligence. In a handful of jurisdictions — Alabama, Maryland, North Carolina, Virginia, and the District of Columbia — any fault by the plaintiff, even one percent, is a complete bar to recovery. A plaintiff 5% at fault recovers nothing. This is the single most consequential venue fact in American tort law, and it is why the same collision produces a six-figure settlement on one side of a state line and a denial letter on the other.

Pure comparative fault. The plaintiff's recovery is reduced by the plaintiff's percentage, with no cutoff. A plaintiff 80% at fault still recovers 20% of the damages. California adopted this in Li v. Yellow Cab Co., 13 Cal. 3d 804 (1975), replacing contributory negligence by judicial decision.

Modified comparative fault. The majority rule, in two flavors:

The 50% bar — the plaintiff recovers only if less at fault than the defendant. At exactly 50%, recovery is barred.
The 51% bar — the plaintiff recovers unless more at fault than the defendant. At exactly 50%, recovery is allowed, reduced by half.

That one-percentage-point difference decides cases. In a two-car intersection collision with disputed light sequence, juries land on 50/50 with some regularity.

Joint and several liability, and its retreat. Historically, any defendant whose negligence contributed to an indivisible injury was liable for the whole. Most states have modified this — abolishing it, limiting it to defendants above a fault threshold, or applying it only to economic damages. The practical consequence: with an insolvent primary tortfeasor and a marginally at-fault deep pocket, the recovery may be capped at the deep pocket's percentage.

Non-party fault. Many states allow the jury to allocate fault to persons who are not parties — the phantom vehicle, the settled defendant, the employer immune under workers' compensation. This is how a defense verdict is engineered without ever calling the absent party a defendant.

Practice point. Before valuing any claim, answer three questions: What is the fault regime? Is joint and several liability available? Can fault be allocated to non-parties? A case worth $200,000 in a pure comparative state may be worth nothing three hundred miles away.

Part III: The insurance architecture

Here is the part clients never anticipate: the claim is worth what the insurance is worth, and there is usually less insurance than there is injury.

Liability coverage

The at-fault driver's bodily injury liability limits are stated per person and per accident — "25/50" means $25,000 per person, $50,000 per accident total. State minimums remain startlingly low, and in a meaningful share of crashes the at-fault driver has no insurance at all.

The insurer's duties run to its insured, not to the claimant: to defend, and to indemnify within limits. The claimant is a stranger to the contract, which is why bad-faith leverage requires the mechanism described below.

First-party coverages that matter more than clients expect

Uninsured motorist (UM) — pays when the at-fault driver has no coverage or cannot be identified (a "phantom vehicle," which usually requires corroboration).
Underinsured motorist (UIM) — pays when the at-fault driver's limits are insufficient. Two competing structures matter enormously: "excess" states stack UIM on top of the liability recovery, while "offset" or "reduction" states subtract the liability recovery from the UIM limit. In an offset state, $25,000 of UIM behind $25,000 of liability coverage is worth exactly zero.
Medical payments (MedPay) — a small no-fault first-party benefit, typically $1,000 to $10,000, payable regardless of fault. Underused, because clients do not know they have it.
Personal injury protection (PIP) — in no-fault states, mandatory first-party coverage for medical expenses and often wage loss, paid regardless of fault, coupled with a tort threshold barring non-economic damage claims unless the injury meets a verbal or monetary standard ("serious impairment of body function," a fracture, permanent disfigurement, or a fixed dollar amount of medical bills). Whether the threshold is met becomes the entire case.

Umbrella and excess policies

A personal umbrella sits above the auto and homeowners policies and frequently supplies the real money. It must be asked about explicitly; it never appears on a police report. A defense lawyer's early disclosure obligations in litigation reach insurance agreements under Fed. R. Civ. P. 26(a)(1)(A)(iv), and most states have parallel provisions or statutes requiring disclosure of limits on request.

The rental and fleet problem

The Graves Amendment, 49 U.S.C. § 30106, preempts state vicarious liability statutes that would hold a rental or leasing company liable for its renter's negligence solely by virtue of ownership. It preserves liability for the company's own negligence — negligent entrustment, negligent maintenance — which is where the claim must be pled if a rental fleet is the target.

Evidence of insurance at trial

Fed. R. Evid. 411 bars evidence that a person was or was not insured to prove negligence, while allowing it for other purposes — agency, ownership, control, or witness bias. Jurors are not told about policy limits, which is why the same case that settles for a $50,000 policy limit can produce a $400,000 verdict.

Part IV: The first seventy-two hours, and why they decide the case

Most of what determines the value of an injury claim happens before anyone hires a lawyer.

Report and document. A police report with a citation issued to the other driver is the cheapest liability evidence that exists. Photographs of vehicle positions, damage, skid marks, sight lines, and the roadway, taken before the vehicles are moved, cannot be recreated. Modern vehicles carry event data recorders that log pre-impact speed, braking, throttle, and belt use for a few seconds — and that data is overwritten or lost when the vehicle is repaired or salvaged. A preservation letter to the vehicle owner and the insurer, sent within days, is one of the highest-value actions available.

Seek treatment, and be consistent. The two most damaging facts in an injury file are a gap in treatment and a delay in initial treatment. An adjuster reading "patient reports pain since MVA three weeks ago, no prior care" discounts causation immediately. This is not gamesmanship on the defense side; it is how contemporaneous medical records are actually read.

Say less to the other insurer. The adjuster for the at-fault driver will request a recorded statement, often within forty-eight hours. There is generally no obligation to give one, and it is routinely used to lock in an incomplete injury description before symptoms fully develop. The obligation to cooperate runs to the claimant's own insurer under the policy — a different thing entirely.

Social media is discovery. A photograph of the plaintiff at a wedding, water skiing, or lifting a child will appear in the defense file, without context and with the caption read aloud.

Do not sign a general release for property damage that also releases bodily injury claims. It happens, and it is often enforced.

Part V: Liens, subrogation, and where the settlement actually goes

This is the least understood and most financially consequential part of an injury claim.

Health insurance reimbursement

ERISA self-funded plans are the strongest claimants. In Sereboff v. Mid Atlantic Medical Services, Inc., 547 U.S. 356 (2006), the Supreme Court held that a plan may bring an equitable action under ERISA § 502(a)(3) to enforce a reimbursement provision against identifiable settlement funds. In US Airways, Inc. v. McCutchen, 569 U.S. 88 (2013), the Court held that the plan document controls — equitable defenses like the common-fund doctrine and the make-whole rule yield to clear plan language, though they fill gaps when the plan is silent.

The critical limit came in Montanile v. Board of Trustees of the National Elevator Industry Health Benefit Plan, 577 U.S. 136 (2016): once the beneficiary has dissipated the settlement fund on non-traceable items, the plan cannot reach the beneficiary's general assets under § 502(a)(3). That is a rule about equitable remedies, not a license — dissipating funds after notice invites other consequences — but it is why plans move quickly and why counsel holding settlement proceeds must resolve the claim before disbursing.

Non-ERISA plans and insured ERISA plans are governed by state law, which frequently limits reimbursement through anti-subrogation statutes, the make-whole doctrine, and mandatory reductions for attorney's fees.

Medicare and Medicaid

Medicare is a secondary payer under 42 U.S.C. § 1395y(b). Conditional payments must be repaid from a liability settlement, and the statute gives the United States a direct right of action with double damages against parties who fail to reimburse. Insurers have mandatory reporting obligations. Where future medical care is anticipated, a Medicare Set-Aside may be appropriate — routine in workers' compensation, more contested in liability settlements.

Medicaid liens are limited by a line of Supreme Court cases. Arkansas Department of Health & Human Services v. Ahlborn, 547 U.S. 268 (2006), held that the federal anti-lien provision limits state recovery to the portion of the settlement representing medical expenses. Wos v. E.M.A., 568 U.S. 627 (2013), struck down a state statute that irrebuttably presumed one-third of any settlement was medical. Then Gallardo v. Marstiller, 596 U.S. 347 (2022), held that a state may reach settlement funds allocated to future medical expenses as well as past ones. The lesson for practitioners: settlement allocation matters, and an allocation agreed with the defendant or approved by a court is far more durable than one asserted after the fact.

Provider liens and letters of protection

Hospitals in most states have statutory liens on personal injury recoveries. Treating providers frequently accept a letter of protection — an agreement to defer billing in exchange for payment from settlement. Both are negotiable, and reduction of provider balances is one of the most reliable ways to increase a client's net recovery. It is also, in a real sense, the part of the job that determines whether the client feels the case was worth it.

The collateral source rule and its erosion

At common law, a defendant may not reduce damages by payments the plaintiff received from independent sources — health insurance, sick pay, disability benefits. The theory is that the wrongdoer should not benefit from the victim's foresight. Many states have modified this by statute, permitting evidence or set-off of collateral payments, and a separate and heavily litigated question is whether the recoverable medical damages are the amount billed or the amount actually paid after insurer write-offs. The difference is often a factor of three.

Part VI: The demand, the policy limits letter, and bad faith

Building the demand package

A demand package is a persuasive document, not a transmittal letter. It should contain:

A clear liability narrative with the supporting evidence attached — report, photographs, statements, citations.
A complete medical chronology with the records and bills organized and summarized.
Wage loss documentation from the employer, and a vocational or economic analysis if earning capacity is affected.
The human story: what the plaintiff could do before and cannot do now, told through specifics rather than adjectives.
A demand figure with a stated basis.
A deadline.

The policy limits demand

Where damages plainly exceed the available limits, a properly constructed time-limited demand for policy limits creates the possibility of excess exposure for the insurer. The doctrine varies by state, but the core is this: an insurer that unreasonably refuses a settlement within limits, exposing its insured to a judgment above limits, may be liable for the entire judgment. That converts a $50,000 policy into meaningful leverage.

To work, the demand must be clean: within limits, with a reasonable time to respond, with the documentation needed to evaluate the claim included, with a full release and lien resolution offered, and without conditions the insurer cannot satisfy. Several states regulate the mechanics by statute. A sloppy limits demand — too short a deadline, missing records, an unreasonable condition — gives the insurer a defense and destroys the leverage.

First-party bad faith

A different claim arises when an insurer mishandles its own insured's claim — UM/UIM, PIP, MedPay. Depending on the state, remedies range from contract damages plus interest to extracontractual damages, statutory penalties, and attorney's fees. See Business Insurance and Coverage Disputes for the commercial analogue.

Part VII: When to file suit

Filing changes the economics. It also changes the timeline, usually adding twelve to thirty months.

File when:

The statute of limitations approaches. This is non-negotiable. Limitations periods for personal injury run from one to six years depending on the state, with special rules for minors, incapacity, discovery-rule claims, and — critically — much shorter notice deadlines for claims against governmental entities, sometimes as little as sixty or ninety days. See Statutes of Limitations, Accrual, and Tolling.
Liability is genuinely disputed and needs discovery — phone records, EDR data, corporate policies, prior incidents.
The insurer's evaluation is unreasonable and the file needs the pressure of depositions and a trial date.
Multiple defendants or coverage layers require formal joinder.

Do not file when:

Treatment is ongoing and the damages picture is incomplete. Filing early often means trying the case before maximum medical improvement.
The only real dispute is valuation within a range where litigation costs exceed the gap.
A UIM claim requires exhaustion of the liability policy first and consent to settle, which many policies condition.

For the procedural sequence after filing, see A Comprehensive Guide to Federal Civil Litigation for Small Businesses and Civil Procedure Toolkit. Most auto cases stay in state court; removal requires complete diversity and more than $75,000 in controversy under 28 U.S.C. § 1332, and the presence of a local defendant defeats it. See Removal and Remand.

Part VIII: Death and derivative claims

When the injured person dies, two distinct claims may exist and they are frequently confused.

A survival action belongs to the decedent's estate and recovers what the decedent could have recovered had they lived — medical expenses, lost wages between injury and death, and in most states conscious pain and suffering before death. Some states bar recovery for pain and suffering in survival actions; some cap it.

A wrongful death action belongs to statutorily designated beneficiaries — usually a spouse, children, and sometimes parents — and recovers their losses: financial support, services, society, companionship, and in some states grief. The statutory beneficiary hierarchy is strict, the limitations period is often shorter than for personal injury, and the proceeds usually pass outside the probate estate, which matters for creditors and for estate planning. See Probate and Estate Administration.

Loss of consortium is a spouse's derivative claim for the loss of services, society, and intimacy. It is derivative: if the injured spouse's claim fails, the consortium claim generally fails with it, and a release by the injured spouse may extinguish it if drafted broadly.

Part IX: A worked example

Facts. Maya, 41, a dental hygienist earning $72,000, is struck at an intersection by a delivery van that ran a red light. Independent witness confirms the light. She has a cervical disc herniation at C5-6, undergoes four months of conservative care and then a fusion. Medical bills billed: $186,000. Health plan (self-funded ERISA) paid $71,400 and asserts full reimbursement. She misses five months of work; the practice pays two months of sick leave. Her surgeon expects permanent restrictions on overhead work.

Coverage. The van is owned by a regional delivery company with a $1,000,000 combined single limit and a $5,000,000 umbrella.

Liability. Clear. Negligence per se on the red light; respondeat superior for the driver in the course of employment. The defense pleads comparative fault (she "could have seen him") and gets nowhere with an independent witness.

Damages analysis.

Past medicals: contested between $186,000 billed and $71,400 paid. In this state, the recoverable amount is the amount paid plus amounts the plaintiff remains obligated to pay.
Past wage loss: $30,000, of which $12,000 was covered by sick leave — recoverable under the collateral source rule in this state.
Future medicals: $40,000 present value for injections and monitoring, supported by the surgeon.
Lost earning capacity: the real number. A vocational expert and an economist put the reduction at $210,000 present value based on restricted duty and reduced career runway.
Non-economic: a fusion with permanent restrictions in a 41-year-old, with a documented recovery arc.

The negotiation. The plaintiff demands $1,250,000. The carrier opens at $185,000, arguing degenerative changes on prior imaging. Plaintiff's counsel deposes the treating surgeon, obtains the prior films showing minimal preexisting change at the operative level, and serves a life care plan. Mediation produces $735,000.

The disbursement.

Gross: $735,000
Attorney's fee at 33⅓%: $245,000
Case costs (experts, records, mediation, deposition transcripts): $38,000
ERISA reimbursement: asserted at $71,400. Counsel negotiates a reduction to $47,600 by pressing the plan's silence on fee-sharing and the practical costs of enforcement. See McCutchen on why the plan language mattered.
Outstanding provider balances under letters of protection: $23,000, reduced to $14,000.
Net to Maya: $390,400.

The lesson is not the number. It is that roughly $85,000 of that net came from work done after the settlement figure was agreed. Lien negotiation is not administrative cleanup; it is a material part of the recovery.

Part X: Frequently asked questions

"How much is my case worth?" It is worth the provable damages, discounted by the fault allocation risk and the litigation risk, capped by the available insurance, less liens and fees. Anyone who answers with a multiplier of medical bills is selling something. Bills are a weak proxy; they are inflated by billed-versus-paid distortion and ignore wage loss, permanence, and venue.

"Do I have to give the other insurance company a recorded statement?" Generally no. You owe cooperation to your own insurer under your policy; you owe nothing to the adverse carrier.

"The adjuster offered me $4,000 to settle right now. Should I take it?" Not before you know whether you need surgery. A release is final. The one situation where quick resolution makes sense is a genuinely minor injury with completed treatment and no residual symptoms.

"Can I still recover if I was partly at fault?" In most states yes, reduced by your percentage. In Alabama, Maryland, North Carolina, Virginia, and the District of Columbia, generally no.

"The other driver had no insurance. Is that the end?" No — check your own UM coverage, MedPay, and any umbrella. Also check for other responsible parties: an employer, a vehicle owner, a bar under a dram shop statute, or a municipality for a defective roadway (with its short notice deadline).

"Why is my lawyer waiting to settle?" Usually because you have not reached maximum medical improvement. Settling before the treating physician can state a permanent prognosis means guessing at the largest component of the claim.

"What does the fee actually cover?" A contingency fee (commonly one-third pre-suit, rising to 40% if suit is filed) is calculated on the gross recovery in most fee agreements, with case costs deducted separately. Whether costs come off before or after the fee is calculated is a real difference in dollars, and it should be stated plainly in the agreement. See Attorneys Fees and Costs.

"What if the settlement is structured?" A structured settlement converts part of the recovery into a stream of future payments funded by an annuity, with the payments excluded from income under the personal physical injury exclusion. It is genuinely valuable for minors, for plaintiffs with limited financial experience, and for needs-based benefit preservation — but the pricing should be independently reviewed, and the alternative of a special needs trust considered where public benefits are involved. See Special Needs Trusts and Medicaid Planning.

Part XI: What defense counsel is doing while you do this

Understanding the other side's workflow makes a plaintiff's file better.

Defense counsel and the adjuster are running an evaluation on a grid: liability percentage, special damages verified, prior claims history, venue jury verdict data, plaintiff's credibility and appearance, treatment gaps, and prior medical history. They are ordering an index bureau search for prior claims. They are pulling social media. They are obtaining an independent medical examination — a defense examination, in candor — and the examining physician's report will emphasize preexisting degeneration, symptom magnification indicators, and the adequacy of conservative care.

They are also evaluating their own exposure honestly, because an insurer that misprices a case exposes its insured and itself. The single most effective thing a plaintiff can do is make the file boring to attack: consistent treatment, consistent complaints, documented wage loss, corroborated liability, and a client whose deposition testimony matches the medical records.

Part XII: Case types that follow different rules

The four-element framework is constant. The practical playbook is not.

Commercial trucking. A tractor-trailer case is a different animal from a car case, and the difference is regulatory. Motor carriers operating in interstate commerce are governed by the Federal Motor Carrier Safety Regulations, which impose hours-of-service limits, driver qualification file requirements, drug and alcohol testing, inspection and maintenance duties, and electronic logging device mandates. Each requirement generates a record, and each record has a retention period measured in months. A spoliation letter sent within days — demanding preservation of the ELD data, the driver qualification file, dispatch records, the post-accident testing results, telematics, in-cab video, maintenance records, and the vehicle itself — is the single highest-value early action in a trucking case. Independent claims against the carrier for negligent hiring, training, retention, entrustment, and supervision often survive even where the carrier admits vicarious liability, though a number of states hold that admission of respondeat superior extinguishes them. See Transportation and Logistics Law for the regulatory architecture.

Rideshare and delivery platforms. Coverage turns on the driver's app status at the moment of the crash, and the platform policies are written in explicit periods: offline (personal policy only), app on and waiting for a request (a contingent policy with modest limits), and en route to or carrying a passenger (a large commercial limit, commonly $1,000,000). Establishing app status is a discovery task, and the platform's own data is the proof. The classification of the driver as a contractor rather than an employee shapes the vicarious-liability theory — see Independent Contractor or Employee.

Motorcycles, bicycles, and pedestrians. These cases carry a jury-attitude problem that has nothing to do with the law. Defense themes about helmet use, lane position, dark clothing, and "coming out of nowhere" land with jurors even where the state bars a helmet-use defense on damages. The counterweight is physical evidence: sight-line photography from the driver's actual eye position, timing studies, and, increasingly, video from doorbell cameras and business surveillance systems that is overwritten within days.

Government vehicles and roadway defects. Claims against a state, county, or municipality run through a tort claims act with three traps: a short notice deadline, sometimes sixty or ninety days; damage caps; and discretionary function immunity that protects design decisions while leaving maintenance failures actionable. Missing the notice deadline is unforgiving, and it runs while the client is still in the hospital. See Sovereign Immunity and Suing the Government.

Dram shop and social host claims. Most states permit a claim against a licensed seller who served a visibly intoxicated patron or a minor, and a minority extend it to social hosts. The proof is receipts, point-of-sale timestamps, video, and server testimony — all of which disappear quickly.

Crashworthiness. Where the injury was caused or aggravated by a defect — seat back collapse, roof crush, airbag failure, fuel system fire — the manufacturer is a defendant on a product theory, with the caution that federal motor vehicle safety standards may preempt certain design claims. Geier v. American Honda Motor Co., 529 U.S. 861 (2000), found implied preemption of a no-airbag claim; Williamson v. Mazda Motor of America, Inc., 562 U.S. 323 (2011), declined to find preemption of a lap-and-shoulder-belt claim on a materially similar regulatory record. The difference was whether the federal agency treated the choice among options as a deliberate policy objective. Read both before assuming either result.

Workplace injuries. If the plaintiff was working, workers' compensation is the exclusive remedy against the employer in nearly every state — but not against a negligent third party. A delivery driver rear-ended on the job has a compensation claim against the employer and a tort claim against the other driver, with the compensation carrier holding a lien on the tort recovery. Coordinating the two is a specialty of its own; see Workers Compensation: The Grand Bargain, the Claim, and the Exceptions.

Part XIII: What discovery actually looks for

If the case is filed, the discovery plan should be built backward from the elements in dispute.

On liability, the targets are: the defendant's phone records for the fifteen minutes on either side of impact (obtained by subpoena to the carrier, with the caveat that content requires more than a civil subpoena under the Stored Communications Act); event data recorder downloads from both vehicles, performed by a qualified technician with chain of custody; the defendant's driving history and, for commercial drivers, the qualification file; roadway design and maintenance records; and any video within a quarter mile.

On damages, the defense will seek: all prior medical records, usually far beyond the body parts at issue; prior claims through an index bureau search; employment and earnings records; tax returns where lost earning capacity is claimed; social media; and a defense medical examination. The plaintiff's protection is a targeted protective order limiting the temporal and anatomical scope of the records release — an argument that is much stronger when made before a blanket authorization has been signed. See Obtaining and Enforcing a Protective Order and Mastering Document Discovery.

On the defense side, the deposition of the plaintiff is the case. Its function is to lock in the mechanism of injury, the symptom timeline, prior conditions, activity limitations, and every statement that can be compared against a medical record, a social media post, or surveillance video. Preparation for that deposition — see The Art of Defending Depositions in Federal Court — matters more to case value than almost any motion.

On both sides, the expert disclosures under Fed. R. Civ. P. 26(a)(2) and the reliability standard of Fed. R. Evid. 702, as amended in 2023, govern whether the causation and damages opinions survive. A treating physician offering causation testimony without a written report is one of the most common — and most avoidable — exclusion risks in injury litigation. See Expert Witnesses After the 2023 Amendment to Rule 702.

Primary authority and key doctrines

Negligence elements and standards — Restatement (Third) of Torts: Liability for Physical and Emotional Harm §§ 3, 6, 7, 26, 27, 29.
Palsgraf v. Long Island Railroad Co., 248 N.Y. 339 (1928) — duty and the zone of foreseeable danger.
Summers v. Tice, 33 Cal. 2d 80 (1948) — alternative liability and burden shifting on causation.
Li v. Yellow Cab Co., 13 Cal. 3d 804 (1975) — judicial adoption of pure comparative fault.
Dillon v. Legg, 68 Cal. 2d 728 (1968) — bystander emotional distress and the foreseeability factors most states borrowed.
49 U.S.C. § 30106 — the Graves Amendment and rental-fleet vicarious liability.
42 U.S.C. § 1395y(b) — Medicare Secondary Payer.
Sereboff v. Mid Atlantic Medical Services, Inc., 547 U.S. 356 (2006); US Airways, Inc. v. McCutchen, 569 U.S. 88 (2013); Montanile v. Board of Trustees, 577 U.S. 136 (2016) — ERISA plan reimbursement.
Arkansas Department of Health & Human Services v. Ahlborn, 547 U.S. 268 (2006); Wos v. E.M.A., 568 U.S. 627 (2013); Gallardo v. Marstiller, 596 U.S. 347 (2022) — Medicaid liens on tort recoveries.
Geier v. American Honda Motor Co., 529 U.S. 861 (2000); Williamson v. Mazda Motor of America, Inc., 562 U.S. 323 (2011) — federal preemption of vehicle design claims.
Fed. R. Evid. 411 — evidence of liability insurance.
Fed. R. Civ. P. 26 — insurance agreement disclosure.
State no-fault, tort threshold, comparative fault, collateral source, and wrongful death statutes, which vary materially and control most of the analysis above.