If you hit a semi-truck, what happens next turns on one question: who was at fault. If the truck driver or trucking company caused the crash, you file against a commercial liability policy that starts at a federally mandated $750,000 and often runs much higher, and federal rules give you a backup path to payment even if the carrier violated its own policy. If you caused the crash, you face exposure to the truck’s damage, the cargo’s value, and the revenue the truck loses while off the road — numbers that routinely exceed personal auto policy limits and leave you personally on the hook for the gap. Everything else — the investigation, the evidence fight, the insurance negotiation — flows from that fault determination.
A loaded tractor-trailer can weigh 80,000 pounds against roughly 4,000 for a passenger car. That weight difference drives the severity of injuries, the size of the damages, and the reason these cases are governed by federal regulations rather than ordinary state traffic rules alone.
What to Do Before You Leave the Scene
Call 911 and request medical attention even if you feel uninjured. Adrenaline hides symptoms, and soft-tissue damage or internal bleeding can take hours or days to surface. A medical record from the day of the crash is foundational evidence later.
Collect specific information that you would not bother with in a two-car accident. Along with the driver’s name and insurance details, write down the trucking company’s name, the truck’s license plate, and the USDOT number displayed on the vehicle. Federal rules require every interstate motor carrier to display that number.1Federal Motor Carrier Safety Administration. Highlights of the Commercial Motor Vehicle Marking Final Rule The USDOT number unlocks the carrier’s safety record, insurance information, and inspection history through FMCSA’s public database.
Photograph everything: vehicle damage from several angles, skid marks, debris, fluid trails, traffic signals, and company logos on the truck. Note any nearby businesses or intersections with security cameras — that footage often gets overwritten within days if nobody asks for it. Do not discuss how the accident happened with the driver, the trucking company, or any insurer who contacts you. Statements made at the scene are routinely used later to reduce or deny claims.
If the Truck Driver or Trucking Company Was at Fault
When the truck is at fault, you file against commercial liability insurance, and the coverage is nothing like a personal auto policy. A for-hire carrier hauling non-hazardous property must carry at least $750,000 in liability coverage. Carriers transporting oil or certain hazardous materials must carry $1 million, and those hauling the most dangerous bulk materials face a $5 million minimum.2eCFR. 49 CFR 387.9 – Financial Responsibility, Minimum Levels Many large carriers carry well above those floors.
Federal regulations also require an MCS-90 endorsement on every interstate motor carrier’s liability policy. The endorsement is a safety net: even if the trucking company violated its policy terms or let coverage lapse, the insurer must still pay valid claims up to the federally mandated minimum.3Federal Motor Carrier Safety Administration. Form MCS-90 – Endorsement for Motor Carrier Policies of Insurance for Public Liability The insurer can later chase the carrier for reimbursement, but you get paid first.
Because the money at stake dwarfs a typical auto claim, commercial insurers put experienced adjusters and defense counsel on the file within hours. Expect a thorough, adversarial process. The insurer will request recorded statements, mine your medical history for preexisting conditions, and look for anything suggesting you contributed to the crash. A demand letter outlining your injuries and the compensation sought typically gives the insurer 30 business days to respond. If negotiations stall, the next step is a lawsuit.
What You Can Recover
Recoverable losses fall into two broad categories. Economic damages cover actual financial costs: medical bills from the emergency room through surgery, rehab, and ongoing treatment; lost wages; reduced future earning capacity if your injuries permanently limit what you can do; and vehicle repair or replacement. Because truck crashes tend to produce severe injuries — spinal injuries, traumatic brain injuries, multiple fractures — medical costs alone can reach six or seven figures.
Non-economic damages compensate for harms that do not come with a receipt: physical pain, emotional distress, and the loss of ability to enjoy activities you used to do. These are subjective, and the insurer will push hard to minimize them. Detailed documentation — a journal, testimony from family, reports from treating physicians — strengthens these claims.
In a small share of cases, courts also award punitive damages. These do not reimburse you; they punish conduct that was malicious, oppressive, or showed reckless disregard for safety.4Ninth Circuit District & Bankruptcy Courts. Ninth Circuit Manual of Model Civil Jury Instructions – 5.5 Punitive Damages In trucking, punitive conduct tends to follow recognizable patterns: a company that pressured drivers to falsify log books, knowingly kept an unsafe truck on the road, tolerated drivers operating under the influence, or systematically ignored federal safety regulations. Courts award punitive damages in roughly 5% of verdicts that reach trial.
If You Caused the Accident
The financial exposure flips when you are the one at fault. A loaded tractor-trailer and its cargo can easily represent hundreds of thousands of dollars in value. The trucking company can pursue you for damage to the truck, damage to or loss of the cargo, towing and storage costs, and the revenue the truck would have earned during repair downtime. These claims go against your personal auto liability coverage first.
Here is the problem. Most personal auto policies carry liability limits of $50,000 to $100,000 per accident, a fraction of what truck and cargo damage can total. If the trucking company’s losses exceed your limits, you are personally liable for the difference. The trucking company’s insurer may also pursue subrogation against your insurer for any payments it made on the claim.
If you were driving under the influence or committed a serious traffic violation, you may face criminal charges on top of civil liability, and your insurer may deny coverage for intentional or illegal acts. Commercial drivers face a lower alcohol threshold than regular motorists: a blood alcohol concentration over 0.04% disqualifies a driver from operating a commercial vehicle, regardless of whether they were on duty.5Federal Motor Carrier Safety Administration. Driver Disqualified for Driving a CMV While Off-Duty With a Blood Alcohol Concentration Over 0.04 Percent
Fault Is Rarely Just One Person
Fault in a truck accident turns on negligence: someone had a duty to act safely, failed to meet it, and that failure caused the crash and your injuries. What makes truck cases different from a car-on-car collision is the electronic record. Modern semis carry an Event Data Recorder that captures speed, brake application, throttle position, and sudden deceleration around the moment of impact.6eCFR. 49 CFR Part 395 Subpart B – Electronic Logging Devices They also carry an Electronic Logging Device that tracks the driver’s hours and rest breaks for compliance with federal Hours of Service rules, which cap driving at 11 hours after 10 consecutive hours off and bar driving past the 14th hour on duty.7Federal Motor Carrier Safety Administration. Summary of Hours of Service Regulations EDR data showing the truck was speeding, or ELD records showing the driver had been on the road for 14 straight hours, is powerful evidence of a breached duty.
Liability often extends past the driver. Employers are generally responsible for the negligent acts of their employees within the scope of employment, so a company driver’s fault pulls in the company. The company can also be independently negligent for failing to train, supervise, or monitor its drivers, or for tolerating falsified logs and deferred maintenance. Federal regulations require motor carriers to maintain detailed driver qualification files — driving history, road test certifications, medical examiner certificates, and investigation records from previous employers.8eCFR. 49 CFR Part 391 – Qualifications of Drivers A company that skipped these checks or hired a driver with a history of violations can be sued for negligent hiring.
Other parties can also share fault. A third-party loader may be liable if improperly secured cargo shifted and caused the driver to lose control, under federal cargo securement standards.9eCFR. 49 CFR Part 393 Subpart I – Protection Against Shifting and Falling Cargo A parts manufacturer may be liable for a defective brake system or tire failure. A maintenance contractor may bear fault for improper repairs.
How Shared Fault Changes What You Recover
Both sides often share some blame. Maybe you were following too closely when the truck braked, or you were sitting in a blind spot. The effect on your recovery depends on state law. Most states follow modified comparative negligence, reducing your compensation by your percentage of fault but barring recovery entirely if you are 50% or 51% or more responsible, depending on the state. About a third of states use pure comparative negligence, where you can recover something even at 99% fault, with your award reduced proportionally. Four states and Washington, D.C. still follow contributory negligence, which blocks all recovery if you bear any fault at all.
This matters because the trucking company’s insurer will work aggressively to shift blame onto you. Statements you made at the scene, your speed, phone use — all of it gets scrutinized. The difference between 49% and 51% can be the difference between a substantial recovery and nothing.
The Evidence Clock Starts Immediately
Cases are often lost before anyone realizes a case existed. Federal rules only require trucking companies to retain ELD records and supporting documents for six months.10Federal Motor Carrier Safety Administration. How Long Must a Motor Carrier Retain Electronic Logging Device Record of Duty Status Data Vehicle inspection reports must be kept for 90 days. After those windows close, the data can be legally destroyed.
A spoliation letter — a formal written demand to preserve evidence — should go to the trucking company as soon as possible. The letter puts the carrier on notice that it must retain the truck itself, all EDR and ELD data, GPS records, dispatch logs, driver qualification files, maintenance records, cell phone data, and any dashcam or surveillance footage. If the company destroys evidence after receiving the letter, a court can impose sanctions, including instructing the jury to assume the destroyed evidence was unfavorable to the trucking company.11eCFR. 49 CFR 395.8 – Driver’s Record of Duty Status
Meanwhile, the trucking company’s insurer often dispatches its own investigation team to the scene within hours, sometimes before the wreckage is cleared. Their job is to build a defense, not help you.
The Deadline to File
Every state sets a statute of limitations after which you lose the right to sue. For personal injury claims, that window runs from one year to six years depending on the state, with two years being the most common. Some states apply a separate, often shorter, deadline for property damage.
Those deadlines feel generous until you add up the time a truck case actually takes: pulling ELD data, obtaining the driver’s qualification file, identifying every liable party, reaching maximum medical improvement. Starting the process within the first few weeks preserves evidence, keeps the spoliation clock from running out, and leaves room for serious preparation before any filing deadline. Waiting until the last few months is how otherwise valid claims get rushed, undervalued, or lost.