Hit by a semi on I-75? The truck recorded its own speed and braking in the seconds before the crash. Do you know how long that record lasts?
Motor carriers must keep a driver's electronic logbook records (Records of Duty Status) for six months under 49 CFR § 395.8(k)(1). No federal rule requires them to keep the truck's Engine Control Module (ECM) "black box" data, which can be overwritten once the truck is back on the road. A spoliation letter, sent fast, puts the carrier on notice to preserve it.
I-75 is the freight spine of Southwest Ohio. Through Butler, Warren, and Montgomery Counties, past Middletown, Franklin, and Springboro and on into Dayton, it carries thousands of tractor-trailers every day, many loaded up to the 80,000-pound federal limit. Our office is in Franklin, on that same stretch of highway.
When a passenger car and a semi collide, the people in the car take the worst of it: spinal cord injuries, brain injuries, and too often a death in the family. These cases also work differently from an ordinary car crash. Federal safety regulations apply. Several companies may stand behind a single truck. And much of the most important evidence is electronic, and it won't stay around on its own.
What happens in the first days after a crash: Trucking companies and their insurers often send investigators to a serious crash within hours. While you're getting medical care, they're photographing the scene, interviewing the driver, and pulling the truck's electronic records. That's their job. Your side needs the same evidence, and you need to act quickly to make sure it's still there.
The Truck's "Black Box": ECM and ELD Data
Modern commercial trucks carry two systems that record what the truck was doing before, during, and after a crash.
- Engine Control Module (ECM): Often called the truck's "black box." Depending on the engine manufacturer, it can record vehicle speed, brake application, throttle percentage, engine RPM, clutch use, and whether cruise control was on in the seconds around a hard-braking or crash event.
- Electronic Logging Device (ELD): Required by the Federal Motor Carrier Safety Administration (FMCSA) under 49 CFR Part 395, the ELD connects to the engine and automatically records driving time, duty-status changes, vehicle movement, and approximate location. Carriers must keep these Records of Duty Status and supporting documents for six months (49 CFR § 395.8(k)(1)).
(A hypothetical example): A truck driver says they were driving at the speed limit on I-75 near the Franklin/Springboro exit. The ECM download shows the truck nearly 10 mph over the posted limit, with no brake application until less than one second before impact. When testimony conflicts, this kind of objective data is often what settles it.
Why the Spoliation Letter Can't Wait
No federal rule tells a carrier how long to keep ECM crash data. Many ECMs store event data in a limited, rolling memory buffer. Depending on the hardware, driving hours, and ignition cycles, that data can be overwritten within days or weeks if the truck stays in service. Routine maintenance can wipe it too.
A spoliation letter is a formal written demand from your attorney to every party who may be responsible, telling them to preserve the evidence. It should cover:
- Complete ECM and event data recorder downloads, in unedited native electronic format.
- ELD records and supporting documents (which carriers must keep for six months under 49 CFR § 395.8(k)(1)).
- Driver Qualification Files under 49 CFR Part 391, including CDL verification, annual driving-record reviews, and medical examiner certificates.
- Driver Vehicle Inspection Reports (DVIRs) under 49 CFR § 396.11. For property-carrying trucks, a written report is required when the driver finds or is told about a defect, and carriers must keep the report, the repair certification, and the driver's review for three months. Under § 396.13, the next driver must review the last report before driving.
- Forward-facing and cab-facing video, telematics, and GPS data.
- Dispatch communications, text messages, and phone records from around the time of the crash.
- Post-accident drug and alcohol test results required under 49 CFR § 382.303.
Ohio Law on Destroyed Evidence
The letter does two things under Ohio law. First, Ohio courts generally won't sanction a party for electronic data lost through the "routine, good-faith operation" of an electronic system (Ohio Civ.R. 37(F)). Once a carrier has a written preservation demand in hand, letting the truck keep overwriting its own crash data is much harder to call good faith. Second, Ohio recognizes a separate claim for the willful destruction of evidence, which requires proof that the defendant knew litigation was probable (Smith v. Howard Johnson Co., 67 Ohio St.3d 28 (1993)). The letter is that proof. Courts can also impose sanctions in the injury case itself, including instructing the jury that it may infer the destroyed evidence would have hurt the party that destroyed it.
FMCSA Safety Violations That Show Up in I-75 Crashes
Trucks operating in interstate commerce are governed by Title 49 of the Code of Federal Regulations. Proving negligence often comes down to showing which rule was broken and how that contributed to the crash.
1. Hours of Service and Driver Fatigue (49 CFR § 395.3)
A property-carrying driver may not drive more than 11 hours after 10 consecutive hours off duty, or drive beyond the 14th hour after coming on duty. Delivery schedules that can't be met legally push drivers past these limits.
2. Vehicle Maintenance and Brakes (49 CFR Part 396)
A loaded semi needs far more room to stop than a car. When carriers skip required inspections and repairs, brake and equipment failures follow, and the DVIR and repair records show whether known defects were fixed.
3. Cargo Securement and Weight (49 CFR § 392.9; Part 393, Subpart I; 23 CFR Part 658)
Unsecured or poorly balanced cargo can shift in a turn and cause a rollover or jackknife, a real risk on I-75's entrance and exit ramps. An overweight truck puts more strain on its brakes and needs even more distance to stop.
4. Driver Qualification Standards (49 CFR Part 391)
Part 391 sets the federal minimum standards. Liability comes from Ohio negligence law, through claims like negligent hiring, entrustment, and retention, where a carrier's failure to follow Part 391 is strong evidence that it fell below the standard of care.
Who Can Be Responsible: Carriers, Brokers, and Montgomery (2026)
More than one company is often responsible for a single truck crash:
- The Motor Carrier: Liable under the doctrine of respondeat superior for the negligent acts of employee drivers committed within the scope of employment, as well as for direct corporate negligence in hiring, training, and maintenance.
- Freight Brokers: Brokers arrange the carrier that hauls a load. On May 14, 2026, the U.S. Supreme Court unanimously held in Montgomery v. Caribe Transport II, LLC that the Federal Aviation Administration Authorization Act (FAAAA, 49 U.S.C. § 14501(c)(1)) does not preempt state-law negligent-selection claims against brokers, because those claims fall within the statute's motor vehicle safety exception (§ 14501(c)(2)(A)). In Ohio, the federal Sixth Circuit had already reached the same result in Cox v. Total Quality Logistics (2025). Montgomery decides only that these claims can go forward. Whether a particular broker was negligent still has to be proven. The decision applies to brokers of interstate freight; the statute treats purely intrastate brokerage differently.
- Shippers and Loading Facilities: Companies that loaded, secured, or balanced the cargo.
- Maintenance and Repair Facilities: Outside contractors who made negligent repairs or missed out-of-service safety conditions.
Ohio Comparative Fault and Filing Deadlines
Modified Comparative Fault (R.C. § 2315.33)
You can recover damages as long as your share of fault is not greater than the combined fault of everyone else involved. In practice, that means 50% or less. Your award is reduced by your percentage of fault, so a 20% share reduces the award by 20%. If you are found more than 50% at fault, you recover nothing.
Statutory Deadlines: Under R.C. § 2305.10, a bodily injury lawsuit generally must be filed within two years after the claim accrues. A wrongful death action must be filed within two years of the date of death under R.C. § 2125.02(D). For further information on healthcare billing during a personal injury claim, see our guide on how medical bills are handled after an Ohio car accident.
Talk to a lawyer early: The two-year deadline isn't the one that matters most in a truck case. The ECM data's is. If you or a family member was hurt in a truck crash on I-75 or anywhere in Southwest Ohio, call DAC Law in Franklin at 937-743-1500 to schedule a confidential consultation.
Frequently Asked Questions About Ohio Truck Accidents
What federal rules govern the retention of semi-truck electronic logging data?
Under 49 CFR § 395.8(k)(1), motor carriers must keep driver Records of Duty Status generated by Electronic Logging Devices (ELDs), along with supporting documents, for six months. No federal rule sets a retention period for Engine Control Module (ECM) data, which is why a prompt spoliation letter putting the carrier on notice is so important.
What is an evidence spoliation letter in a commercial trucking claim?
It's a formal written demand sent to the motor carrier, driver, insurer, and freight broker to preserve all physical and electronic evidence, including ECM downloads, ELD records, inspection reports, dispatch records, and maintenance logs, before they are overwritten or discarded in the ordinary course of business.
Can freight brokers be sued for negligent carrier selection after a crash in Ohio?
Yes. On May 14, 2026, the U.S. Supreme Court held in Montgomery v. Caribe Transport II, LLC that the Federal Aviation Administration Authorization Act (FAAAA) does not preempt state-law negligent-selection claims against freight brokers, because those claims fall within the federal motor vehicle safety exception. The injured person must still prove the broker was negligent.
What is the statute of limitations for an Ohio commercial truck crash lawsuit?
Under Ohio Revised Code § 2305.10, bodily injury lawsuits generally must be filed within two years from the date the claim accrued. Wrongful death actions arising from truck crashes must be filed within two years of the date of death under R.C. § 2125.02(D).
Legal Disclaimer: The information provided in this article is for general educational and informational purposes only and does not constitute formal legal advice. Viewing this website or submitting an inquiry does not establish an attorney-client relationship. Every personal injury and commercial truck collision case involves unique facts, evidence, and applicable laws.
Past case results and verdicts do not guarantee, warrant, or predict future legal outcomes. Prospective clients should consult a qualified, licensed attorney regarding their individual circumstances.