Chicago Accident Lawyer Blog
A commercial truck crash begins two investigations at the same time.
Police and emergency personnel investigate the collision and protect the public. The trucking company, insurer, claims administrator, and defense counsel investigate the company’s exposure. The second investigation may begin before an injured person leaves the hospital.
Commercial trucking operations create records that do not exist in an ordinary passenger-car case. Electronic logging devices record driving activity. Engine systems may record speed and braking information. Dispatch platforms track routes and messages. Carriers maintain driver files, inspection reports, maintenance records, drug-testing records, cargo documents, and safety materials.
These records can establish why the crash happened. They can also disappear through routine overwriting, document-retention schedules, equipment repair, vehicle sale, or data migration. A serious truck case therefore requires prompt preservation and a working knowledge of the Federal Motor Carrier Safety Regulations.
Why Truck Crashes Require a Broader Investigation
An ordinary automobile case often focuses on two drivers. A trucking case may involve a network of people and companies:
- The tractor driver
- The motor carrier operating under federal authority
- The tractor owner
- The trailer owner
- A leasing company
- A freight broker
- A shipper
- A cargo-loading company
- A maintenance provider
- A repair shop
- A staffing company
- A manufacturer
- A company that directed dispatch or safety operations
The name painted on the tractor may not identify every responsible party. The driver may operate under another carrier’s United States Department of Transportation authority. One entity may own the tractor, another may own the trailer, and another may control the driver’s work.
Counsel will investigate corporate relationships, federal filings, leases, operating agreements, dispatch records, insurance policies, contracts, payment records, and the practical allocation of control.
Federal Regulations Supply Safety Standards and Evidence
The Federal Motor Carrier Safety Regulations divide carrier obligations into subject areas.
Important parts include:
- Part 382, controlled-substance and alcohol testing
- Part 383, commercial driver licensing
- Part 390, general applicability and definitions
- Part 391, driver qualifications
- Part 392, driving rules
- Part 393, parts and accessories necessary for safe operation
- Part 395, hours of service
- Part 396, inspection, repair, and maintenance
A regulatory violation may support a negligence theory, but a regulation does not automatically establish liability for every collision. Counsel must connect the rule, the conduct, and the crash. The defendant may dispute whether the regulation applied to the vehicle, trip, driver, carrier, or operation.
The regulations also identify records that a carrier should possess. Missing records may raise questions about compliance, retention, accuracy, or spoliation.
Electronic Logging Devices and Hours-of-Service Evidence
Part 395 regulates hours of service for covered commercial drivers. Electronic logging devices, commonly called ELDs, record driving time and other duty-status information.
ELD evidence may help answer:
- How long had the driver been operating?
- When did the driver last rest?
- Did the driver log loading, fueling, inspection, or waiting time accurately?
- Did the driver make edits?
- Did the carrier suggest or require an edit?
- Did unidentified driving time appear on the vehicle?
- Did dispatch communications pressure the driver to continue?
- Do fuel, toll, GPS, and delivery records match the log?
Federal rules generally require a motor carrier to retain records of duty status and supporting documents for six months. FMCSA guidance also explains that carriers must retain ELD data and a backup copy for that period.
The six-month period makes early preservation important. A lawsuit may not begin until months after the collision. If the injured party does not hire a knowledgeable counsel right away, the carrier may claim that its ordinary retention period expired.
Original records and edits both matter
An edited log does not necessarily replace the original data. FMCSA states that original ELD (electronic logging devices) records remain retained after permitted edits and annotations. A carrier must provide driver access to records within the applicable six-month period when the driver cannot obtain them independently.
The audit trail may show:
- Who proposed an edit
- When the edit occurred
- Whether the driver accepted it
- What annotation accompanied it
- Whether the change converted driving time into another status
- Whether the edit matched objective vehicle movement
A printed log may not show the full history. Counsel should request native ELD data, output files, edit histories, annotations, unidentified-driver records, user manuals, account information, and records identifying the device and software version.
Unassigned driving records may reveal hidden vehicle use
An ELD may record vehicle movement without assigning it to a logged-in driver. Under 49 C.F.R. § 395.32(c), the carrier must either assign the record to the appropriate driver or annotate it and explain why it remained unassigned. FMCSA states that carriers must retain unidentified driving records for at least six months and make them available to authorized safety officials.
Unassigned time may result from an innocent login error. It may also reveal incomplete records, driver swapping, yard movement, unidentified operation, or an effort to avoid hours-of-service limits. The surrounding evidence determines its significance.
Dispatch and Supporting Documents May Confirm or Contradict the Log
An ELD should not be analyzed alone. It needs to be compared against:
- Dispatch messages
- GPS and telematics
- Bills of lading
- Pickup and delivery records
- Fuel receipts
- Toll data
- Scale tickets
- Gate records
- Hotel receipts
- Credit-card transactions
- Mobile-phone location data
- Maintenance timestamps
- Camera footage
- Payroll and settlement statements
A driver may log off duty while receiving instructions, loading cargo, completing paperwork, fueling, or waiting under company control. Whether a particular activity counts as on-duty time requires analysis of the facts and applicable rules.
The strongest cases often use multiple independent data sources to reconstruct the driver’s workday.
Driver Qualification Files
Part 391 addresses driver qualifications. A motor carrier should maintain records showing that the driver met applicable licensing, medical, employment-history, road-test, and safety requirements.
A driver qualification investigation may examine:
- The employment application
- Prior employers
- Driving history
- Commercial driver’s license status
- Medical certification
- Road-test records or accepted equivalents
- Annual motor-vehicle record review
- Safety-performance history
- Prior crashes
- Prior violations
- Training records
- Disciplinary records
- Restrictions or endorsements
The file does not tell the entire story. A carrier may keep safety, human-resources, insurance, and operational records in separate systems. Discovery should request the full universe of records rather than accept a folder labeled “driver qualification file” as complete.
Negligent hiring, retention, training, or supervision claims require facts beyond the occurrence of a crash. The evidence must show what the company knew or should have known and how the alleged failure related to the collision.
Inspection, Repair, and Maintenance Records
Part 396 governs inspection, repair, and maintenance. The regulations require carriers to systematically inspect, repair, and maintain vehicles subject to their control and to keep parts and accessories in safe and proper operating condition.
Several provisions often matter:
- Section 396.3 addresses systematic inspection, repair, and maintenance.
- Section 396.7 prohibits operation of a motor vehicle in a condition likely to cause an accident or breakdown.
- Section 396.11 addresses driver vehicle inspection reports in covered circumstances.
- Section 396.13 requires the driver to review the last inspection report when applicable and to satisfy himself or herself that the vehicle remains in safe operating condition before driving.
- Section 396.17 requires periodic inspection at least once during the prescribed period.
The application of individual provisions may depend on the vehicle and operation.
Brake evidence requires more than a post-crash photograph
Brake cases may involve:
- Worn linings
- Out-of-adjustment components
- Air leaks
- Damaged hoses
- Defective chambers
- Electrical faults
- Trailer connector problems
- Warning lights
- Contaminated components
- Failed repairs
- Inadequate inspections
- Mismatched tractor and trailer systems
The carrier may argue that the crash damaged the component. The plaintiff may argue that wear, contamination, corrosion, fault codes, prior warnings, or maintenance history proves that the defect existed before impact.
The parties should preserve the tractor and trailer before destructive testing, repair, salvage, or return to service. A qualified expert may need to photograph, scan, measure, test, and document the system under an agreed protocol.
Maintenance files should connect records to the exact vehicle
A generic invoice may identify a fleet unit but omit the vehicle identification number, mileage, technician, complaint, diagnostic process, or parts used. A complete request may seek:
- Unit number and VIN history
- Ownership and lease records
- Maintenance schedules
- Preventive-maintenance records
- Repair orders
- Technician notes
- Diagnostic scans
- Parts invoices
- Warranty claims
- Roadside-inspection reports
- Out-of-service records
- Driver complaints
- Defect reports
- Fleet-management data
- Vendor communications
- Payment records
A carrier that relies on an outside shop remains part of the investigation. The repair shop may have records that the carrier does not produce.
Pre-Trip and Post-Trip Inspections
Drivers play a direct role in vehicle safety. Before operating, a driver must inspect or otherwise satisfy the applicable regulatory requirements concerning the vehicle’s condition. Drivers must also respond to known defects.
A pre-trip inspection should not become a ritual signature. The relevant questions include:
- How long did the inspection take?
- Where did it occur?
- What did the driver examine?
- Did the driver connect a different trailer?
- Did the driver test lights and brakes?
- Did dashboard warnings appear?
- Did the driver report earlier problems?
- Did dispatch instruct the driver to continue?
- Did another driver use the vehicle immediately before the trip?
Telematics, video, GPS data, yard records, and timestamps may show whether the driver had enough time to perform the claimed inspection.
Engine, Telematics, and Event Data
Commercial vehicles may contain several electronic systems. We often refer generally to a truck’s “black box,” but the phrase may describe different components. Potential sources include:
- Engine control modules
- Airbag or restraint control modules
- Collision-mitigation systems
- Stability-control systems
- Fleet telematics
- GPS platforms
- Dash cameras
- Forward-collision warning systems
- Lane-departure systems
- Brake-control modules
- Trailer tracking devices
- Refrigeration units
- Mobile dispatch devices
Depending on the system, data may include:
- Vehicle speed
- Engine speed
- Brake application
- Accelerator position
- Cruise-control status
- Fault codes
- Sudden deceleration
- GPS coordinates
- Video
- Lane warnings
- Following distance
- Seat-belt status
- Steering input
- System alerts
Not every truck stores the same information. Some systems overwrite data. Some require proprietary software. Others transmit data to a third-party vendor.
It is important to hire a knowledgeable lawyer as soon as possible. A preservation letter should identify the tractor, trailer, device, vendor, account, date range, file format, and data categories. Counsel should also seek documentation explaining how the system records, stores, edits, exports, and deletes information.
Cameras May Show More Than the Collision
Forward-facing video may show traffic, weather, lane position, signals, and the driver’s response. Driver-facing video may show attention, fatigue, phone use, seat-belt use, or activity inside the cab. The carrier may preserve only a short event clip. The surrounding minutes may matter more because they show:
- Earlier drifting
- Repeated warnings
- Following distance
- Speed changes
- Traffic congestion
- Phone handling
- Fatigue indicators
- A mechanical warning
- An earlier near collision
Counsel should seek the full available time window, metadata, trigger criteria, upload history, event labels, coaching records, and communications concerning the video.
Cellphones and Distraction
Commercial drivers may use:
- Personal phones
- Company phones
- Tablets
- Dispatch units
- Navigation systems
- Messaging platforms
- Headsets
- In-cab screens
A phone bill may show calls and texts but not every app interaction. Relevant evidence may include device extractions, application logs, screen-use data, Bluetooth connections, dispatch messages, photographs, browsing, and location information.
The request must remain proportional and protect unrelated private information. Courts may require a focused protocol tied to the crash period.
Cargo and Securement Evidence
Cargo affects braking, handling, rollover risk, stopping distance, and vehicle stability.
An investigation may examine:
- Weight and distribution
- Securement devices
- Tie-down condition
- Blocking and bracing
- Trailer type
- Center of gravity
- Loading sequence
- Seal records
- Bills of lading
- Scale tickets
- Cargo photographs
- Loading instructions
- Shipper and loader communications
Responsibility may extend beyond the driver and carrier when another company loaded, sealed, or controlled the cargo. The legal analysis depends on control, knowledge, contractual duties, and the nature of the defect.
Drug and Alcohol Testing
Part 382 governs controlled-substance and alcohol testing for covered drivers. Post-accident testing requirements depend on regulatory criteria and timing.
A failure to test does not prove impairment. A negative test does not resolve whether fatigue, distraction, medication, or another condition affected the driver.
Discovery may address:
- Whether testing applied
- When the carrier learned of the crash
- When testing occurred
- Why testing did not occur
- The specimen and collection process
- Chain of custody
- Medical review
- Company policy
- Prior testing history where legally discoverable
- Prescription and over-the-counter medication issues supported by evidence
Counsel should separate regulatory compliance from medical causation and avoid speculation.
Truck Crashes Can Produce Severe Injury Through Several Mechanisms
Large truck collisions differ in vehicle mass, geometry, stiffness, and points of contact. Medical and traffic-safety studies have examined how driver behavior, speed, vehicle type, roadway conditions, restraint use, and crash configuration affect injury severity.
One occupant-level study found that driver factors such as drug use, impaired driving, and inattention correlated with injury severity in large-truck crashes. The study also found associations between seat-belt and airbag availability and lower injury severity among passenger-vehicle occupants. These findings describe statistical relationships and do not determine causation in a specific crash. A prospective analysis of 582 truck crashes found that crash opponents sustained injuries more often and sustained more high-severity injuries than truck drivers. The study also documented substantial lower-extremity risk for truck drivers. Other research has identified vehicle type, roadway geometry, junctions, grades, curves, weather, fatigue, speed, and tire defects as factors associated with truck-crash injury severity.
The medical investigation in an individual case should focus on the actual impact, occupant movement, restraint use, intrusion, emergency findings, imaging, treatment, prognosis, and prior health history.
Common injuries include:
- Traumatic brain injury
- Spinal fractures and disc injury
- Rib and sternal fractures
- Pulmonary injury
- Abdominal injury
- Pelvic fractures
- Upper and lower-extremity fractures
- Crush injury
- Amputation
- Burns
- Psychological injury
- Wrongful death
A high-energy collision may cause multiple injuries across body regions. Emergency physicians may initially focus on life-threatening injuries, while musculoskeletal, neurological, or psychological symptoms become clearer during follow-up care.
What Evidence Matters After an Illinois Truck Crash?
Preservation should address the full operation, not only the tractor.
Important categories include:
- Tractor and trailer in their post-crash condition
- ELD native data, output files, edits, annotations, and unidentified driving records
- Engine, telematics, GPS, camera, and collision-system data
- Driver qualification and safety files
- Hours-of-service records and supporting documents
- Dispatch messages and route instructions
- Inspection, repair, and maintenance files
- Roadside-inspection and out-of-service records
- Driver complaints and defect reports
- Drug and alcohol testing records
- Cargo, loading, securement, and weight records
- Bills of lading, tolls, fuel, scales, gates, and delivery records
- Cellphone and in-cab device evidence
- Corporate relationships, leases, contracts, and insurance policies
- Police records, body-camera footage, 911 recordings, and photographs
- Third-party video and witness statements
- Medical records, imaging, and wage evidence
The preservation demand should identify automatic deletion systems and instruct recipients to suspend them for relevant information.
Frequently Asked Questions
How long does a trucking company keep ELD records?
Federal regulations generally require a motor carrier to retain records of duty status and supporting documents for six months. FMCSA also states that carriers must retain ELD data and a backup copy for six months.
Can a trucking company edit an electronic log?
Permitted edits may occur, but the ELD retains the original record. The audit history, annotation, timing, and identity of the person proposing or accepting the edit may become important evidence.
What is unassigned driving time?
It is vehicle movement that the ELD did not assign to a logged-in driver. The carrier must assign the record to the correct driver or annotate why it remains unassigned and retain it as required.
Does the truck have a black box?
It may contain several electronic systems capable of recording useful data. The available information depends on the tractor, engine, safety systems, telematics platform, trailer, and vendor.
Can the trucking company repair the truck after the crash?
A company may need to move or repair equipment, but it should preserve relevant evidence once it reasonably anticipates litigation. Counsel should send a preservation demand and arrange an inspection promptly.
Is the truck driver always the only defendant?
No. The carrier, owner, lessee, maintenance company, loader, shipper, broker, staffing company, manufacturer, or another entity may bear responsibility depending on the facts and law.
Speak With a Chicago Truck Accident Law Firm That Clients Can Visit
Zneimer & Zneimer P.C. trucking accident attorneys maintain a physical Chicago office. Clients may meet with the lawyers and paralegals who investigate and work on their cases.
Truck litigation requires direct attention to the driver, carrier, equipment, records, medical evidence, insurance, and corporate relationships. Early legal work may preserve ELD records, camera footage, telematics, maintenance evidence, and the tractor and trailer before routine retention systems or repairs alter the evidence.