What Evidence Matters in a Texas Truck Accident Case?

After a serious 18-wheeler crash, the police report may be only the beginning of the investigation.

Commercial trucks and trucking companies can generate records that do not exist in an ordinary passenger-car accident. Those records may help answer important questions about how the crash happened, what the driver was doing beforehand, whether the truck was properly maintained, and whether other companies contributed to the collision.

The evidence available depends on the particular vehicle, carrier, and circumstances. But several categories frequently deserve attention.

Electronic Data From the Truck

Modern commercial vehicles may contain electronic systems capable of recording information relating to vehicle operation.

Depending on the equipment installed and the nature of the event, available data may include information concerning speed, engine activity, braking, throttle position, or other operating conditions.

People often refer to this generically as a truck's “black box,” although there is no single universal system installed on every commercial truck.

The important question is what data the particular vehicle generated and whether that information still exists.

Electronic Logging Devices and Driver Logs

Federal hours-of-service rules regulate driving and on-duty time for many commercial drivers.

Electronic logging devices, or ELDs, commonly record a driver's duty status. Those records can help establish when a driver was driving, on duty, resting, or off duty.

Federal regulations require covered motor carriers to retain records of duty status and supporting documents for at least six months after receipt.

That retention period is one example of why evidence preservation can matter early in a truck case.

GPS, Fleet Telematics, and Dispatch Records

Many trucking companies use electronic systems to track their vehicles and communicate with drivers.

Those systems may provide information about where a truck traveled, when it arrived or departed, vehicle speed, routes, deliveries, or communications between the driver and dispatch.

These records can sometimes be compared against driver logs and other records to develop a more complete timeline.

Driver Qualification Records

Federal regulations require covered motor carriers to maintain qualification files for their drivers.

Those files may contain materials such as the driver's employment application, motor-vehicle records, road-test documentation, annual driving-record review information, and medical-certification records. Federal law generally requires the qualification file to be retained throughout the driver's employment and for three years afterward, subject to specific rules for individual documents.

Those documents may become relevant when a case raises questions about whether a driver was properly qualified or whether the carrier had information about the driver's history.

Inspection, Repair, and Maintenance Records

Mechanical problems can contribute to serious crashes.

Federal regulations require motor carriers to systematically inspect, repair, and maintain vehicles subject to their control and to maintain specified records concerning inspections, repairs, and maintenance. Those records generally must be retained for one year while the vehicle remains under the carrier's control and for six months after it leaves the carrier's control.

If a case involves allegations concerning brakes, tires, steering, lights, suspension, or another mechanical system, the truck's maintenance history may become particularly important.

Dashcams, Surveillance Video, and Photographs

Video can be some of the most powerful evidence in an accident case.

Potential sources include truck-mounted cameras, nearby businesses, roadway cameras, residential surveillance systems, other vehicles, and witnesses' phones.

Unlike many formal trucking records, third-party video may be overwritten quickly. Identifying possible cameras soon after a collision can therefore matter.

Cargo and Shipping Records

When cargo shifts, falls, or changes a vehicle's stability, loading and securement may become part of the liability investigation.

Federal regulations impose cargo-securement requirements on covered commercial vehicles, including requirements intended to prevent cargo from falling or shifting enough to adversely affect vehicle stability or maneuverability.

Relevant evidence may include bills of lading, weight tickets, photographs, loading records, contracts, and records identifying who loaded or secured the cargo.

Post-Accident Drug and Alcohol Testing

Federal law requires post-accident drug or alcohol testing in certain commercial-vehicle accidents, but not after every crash.

The requirements depend on circumstances such as whether the crash involved a fatality, whether the commercial driver received a qualifying citation, whether someone received immediate medical treatment away from the scene, and whether a vehicle sustained disabling damage requiring a tow.

When the rules apply, testing records may become relevant evidence.

Ordinary Accident Evidence Still Matters

Specialized trucking evidence does not replace the basics.

Police reports, photographs, witness testimony, vehicle damage, roadway evidence, medical records, body-camera footage, 911 recordings, and photographs of injuries may still be central to the case.

Sometimes the strongest case is built by comparing these ordinary sources with commercial records.

A driver's account might be tested against video. An electronic log might be compared with GPS data. A maintenance record might be evaluated alongside a post-crash vehicle inspection.

The value often comes from how the pieces fit together.

Why Preserving Evidence Early Can Matter

Commercial trucking evidence does not necessarily remain available indefinitely.

Federal law expressly permits some important records to be discarded after specified retention periods. Other information may be overwritten through ordinary business operations. Trucks can be repaired, electronic data can change, video can disappear, and witnesses' memories can fade.

That does not mean every accident requires an emergency lawsuit.

It does mean a serious truck case should be evaluated early enough to identify evidence that may need to be preserved.

Questions About Evidence After a Truck Crash?

Lyman Law investigates serious commercial-vehicle accidents in Houston and the surrounding area.

If you were injured in an 18-wheeler accident, we can review what happened and discuss what evidence may be important to your claim.