7 Things Jackknife Accident Attorneys Do After a Truck Crash

Electronic logging devices capture everything the tractor recorded in the moments before the crash. Speed, acceleration, braking force, lane position—it's all there. Demand it immediately. Federal regulations allow carriers to maintain ELD records for 24 months, but state-level discovery rules and preservation obligations tighten the timeline considerably. ELD data isn't subjective or open to interpretation. If the driver was speeding, hard-braking, or accelerating recklessly before the jackknife, the device recorded it. A preservation letter signed by your attorney triggers a legal hold on all evidence. The carrier then faces court sanctions if data "disappears." This is your first move. Get the preservation letter issued within days of the crash. The [FMCSA provides guidance on ELD requirements](https://www.fmcsa.dot.gov/) and data retention for motor carriers, and compliance failures often surface during discovery.

Every commercial driver must maintain a Driver Qualification File: DOT physicals, license records, prior violations, safety violations, training certifications. You need to see every page. Look for gaps—missing physicals mean the driver was operating illegally. Cross-reference with the crash timeline. If the driver had untreated sleep apnea flagged in an old physical but no follow-up, or if the last DOT physical was expired when the crash occurred, the carrier failed basic compliance. A driver with a history of unsafe driving citations or speed violations who then causes a jackknife shows a pattern of negligence the carrier should have caught. Some carriers tolerate bad driving records because they're desperate for drivers. That tolerance is itself negligence—what lawyers call negligent retention. The DQF often reveals this pattern clearly. Courts view hiring and retention decisions as separate from the driver's conduct, making them independent grounds for carrier liability.

The Compliance, Safety, Accountability (CSA) program assigns motor carriers a public score based on roadside inspections and safety violations. The FMCSA publishes these scores publicly, and they're searchable by carrier name. A carrier with a CSA score above the intervention threshold in unsafe driving, hours-of-service compliance, or vehicle maintenance is statistically more likely to cause crashes. That score can support a direct negligence claim against the motor carrier itself—separate from the driver's liability. Pull the CSA records for the carrier involved in your crash. If the company was running a fleet with known safety issues, chronic HOS violations, or a pattern of driver-conduct complaints, that strengthens your argument that the crash was foreseeable. Defense lawyers hate CSA evidence because it shifts liability from "one bad driver made one bad decision" to "one bad company created conditions for crashes." It also signals that larger settlements are defensible because the jury can see the carrier was knowingly negligent.

Federal HOS rules limit drivers to 11 hours of driving after 10 consecutive hours off-duty. If the crash happened in hour 12, or if logs show the driver cut rest periods short, that's a violation that directly contributed to the crash. Fatigue is a documented factor in jackknife accidents—tired drivers have slower reflexes, poor judgment, and panic-stricken reactions during emergency braking. Pull the last 8 days of logs for the driver. Look for patterns: Are rest periods suspiciously short? Do logs align with GPS or ELD timestamps, or are there gaps suggesting falsification? Some drivers falsify logs with carrier knowledge or tolerance. Falsified logs are a violation equal to the underlying HOS offense. If you find that logs were falsified, you've uncovered two violations layered on top of each other. Courts treat log falsification seriously because it indicates the carrier prioritized delivery schedules over driver safety. Request any dispatch communications that show the driver was pressured to meet tight schedules.

Dispatch logs show what the driver was instructed to do, where to go, and what deadlines were set. If a dispatcher pressured the driver to meet an unrealistic schedule, or if the load was heavier or more unstable than represented, that's evidence of carrier negligence contributing to the jackknife. Heavy or unbalanced loads are a major jackknife risk—the trailer becomes unpredictable during hard braking. Request the bill of lading, weight certificates, and load manifests. Cross-reference with the driver's stated load weight in any pre-crash communications. If the driver loaded 45,000 pounds but the manifest says 35,000, that discrepancy created the instability that triggered the loss of control. Dispatch records also reveal whether the driver reported mechanical issues before the crash and whether the carrier ordered repairs or told the driver to keep moving. A carrier that ignores reported brake problems or steering issues is knowingly operating an unsafe vehicle.

Federal regulations mandate post-crash drug and alcohol testing for serious commercial vehicle accidents. That test result is evidence. If the driver tested positive, that's powerful evidence. If the driver tested negative or if the carrier failed to perform the test within the required timeframe, that's also significant—it's evidence of non-compliance. A carrier that skips mandated post-crash testing is inviting liability because it suggests the company was cutting corners or hoping to hide something. Request the chain of custody for all post-crash samples, the testing lab's credentials, and the timeline of specimen collection. If the sample was mishandled, the test was delayed beyond the regulatory window, or the lab wasn't certified, the results may be inadmissible or challengeable. But the absence of a test, when one was required, often becomes admissible as evidence that the carrier failed to follow federal safety protocols.

Jackknife crashes are sometimes caused by brake failures, tire blowouts, or steering defects. Pull the tractor and trailer maintenance records for the 12 months before the crash. Look for repeat repairs, deferred maintenance, or failed DOT inspections. If the tractor had a brake complaint three months earlier and wasn't fully repaired, and then the brakes failed during the crash, that's direct negligence. Brake Out of Service (OOS) violations are serious—they indicate a defect severe enough to make the vehicle unsafe to operate. If the tractor was running with a known OOS violation when the crash occurred, liability is nearly certain. The [NHTSA vehicle safety database](https://www.nhtsa.gov/) and state DOT records sometimes contain complaints about specific tractors or trailers. Trailer maintenance matters equally: tire condition, coupling systems, lighting, and brake function. A jackknife is often a control failure, and control failures almost always trace back to deferred maintenance or failed inspections the carrier ignored.