Causes & Liability

What Are the Most Common Causes of Truck Accidents?

The causes of truck accidents are often more complicated than the first story told at the scene. A crash involving an 18-wheeler, semi-truck, dump truck, tanker, delivery truck, tow truck, garbage truck, or construction vehicle may look like simple driver error, but the real cause may involve fatigue, speeding, unsafe dispatch, poor maintenance, overloaded cargo, brake problems, tire failure, distracted driving, weak training, or a trucking company that ignored safety rules.

Truck accidents are different from ordinary car crashes because commercial vehicles are heavier, harder to stop, more difficult to maneuver, and subject to federal safety rules. A fully loaded tractor-trailer can cause catastrophic injuries when something goes wrong. That is why identifying the common causes of truck accidents is not just an academic exercise. It can determine who is liable, what evidence must be preserved, and how much compensation may be available.

This guide explains what are the common causes of truck accidents, what causes dump truck crashes, what evidence can prove fault, and why early investigation matters in a Texas truck accident claim.

Texas Truck Accident Statistics for 2024

Texas commercial vehicle crash data 2024 figure Why it matters
Commercial motor vehicle crashes in Texas 39,393 Truck crashes are common enough that insurers have aggressive defense systems
Fatal Texas CMV crashes 546 Fatal truck crashes require immediate preservation of evidence
Deaths in Texas CMV crashes 608 Families may need wrongful death and survival claim analysis
Suspected serious injury CMV crashes 1,261 Serious injury cases often involve future medical and wage-loss claims
Suspected serious injuries in CMV crashes 1,601 Severe harm increases the need for expert analysis
Bexar County CMV crashes 2,684 San Antonio roads see significant commercial vehicle traffic
Harris County CMV crashes 6,313 Major Texas freight corridors create high truck crash exposure

TxDOT reported 39,393 commercial motor vehicle crashes in Texas in 2024, including 546 fatal crashes and 608 deaths. These numbers show why truck accident claims must be investigated quickly, especially when the crash involves serious injury, disputed fault, or multiple commercial companies.

What Are the Common Causes of Truck Accidents?

The most common causes of truck accidents include:

  • Driver-related causes: fatigue, speeding, distraction, impairment, following too closely, and unsafe lane changes
  • Vehicle-related causes: brake failure, tire defects, steering problems, and poor maintenance
  • Cargo-related causes: overloading, unbalanced loads, shifting cargo, and improper securement
  • Company-related causes: unsafe hiring, inadequate training, unrealistic delivery schedules, and ignored safety violations
  • Environmental causes: bad weather, poor visibility, road defects, and construction-zone hazards

More than one factor may contribute to the same collision.

The best truck accident investigation asks three questions:

  1. What did the truck driver do before impact?
  2. What did the trucking company do before the driver ever got on the road?
  3. What evidence proves the crash was preventable?

Driver Fatigue and Hours-of-Service Violations

Driver fatigue is one of the most dangerous causes of truck accidents because tired drivers may react slowly, drift lanes, miss traffic changes, or fall asleep behind the wheel. Truck drivers often face long routes, overnight driving, tight delivery deadlines, loading delays, and pressure to keep moving. Our guide to truck driver fatigue in San Antonio and Bexar County explains how scheduling pressure, driver logs, and electronic records may reveal hours-of-service violations.

FMCSA hours-of-service rules limit the amount of time many commercial drivers may drive and remain on duty. For property-carrying drivers, federal rules generally include an 11-hour driving limit after 10 consecutive hours off duty and a 14-hour driving window. These rules are designed to help drivers stay awake and alert.

Fatigue may be proven with:

  • electronic logging device data
  • driver logs
  • fuel receipts
  • toll records
  • dispatch messages
  • GPS data
  • delivery deadlines
  • cell phone records
  • witness statements
  • crash timing

If a driver was out of hours, falsified logs, skipped rest, or drove while dangerously tired, both the driver and motor carrier may be responsible.

Speeding and Driving Too Fast for Conditions

Speeding is another major cause of truck accidents. Large trucks need more distance to stop than passenger vehicles. When a truck driver speeds, follows too closely, or drives too fast for rain, traffic, curves, construction zones, or hills, the driver may not be able to stop in time.

Speeding can lead to:

  • rear-end crashes
  • underride collisions
  • jackknife accidents
  • rollover crashes
  • loss of control
  • multi-vehicle pileups
  • fatal pedestrian or roadside crashes

Evidence may include engine control module data, dash camera video, skid marks, vehicle damage, witness statements, police measurements, and accident reconstruction. A crash report may identify speed as a factor, but the deeper proof often comes from electronic data and physical evidence.

Distracted Driving

Distracted driving can be devastating when the distracted driver is operating a commercial vehicle. A truck driver who looks away for a few seconds may travel the length of a football field without full attention on the road.

FMCSA states that federal rules prohibit commercial motor vehicle drivers from using handheld mobile devices while driving. Distracted driving can involve texting, calling, dispatch devices, navigation systems, eating, paperwork, adjusting controls, or looking away at roadside activity.

Distraction evidence may include:

  • phone records
  • app activity
  • dispatch messages
  • dash camera footage
  • onboard camera systems
  • witness statements
  • lane drift evidence
  • delayed braking

In a serious crash, a lawyer may need to preserve phone data and company communications quickly before evidence disappears.

Unsafe Lane Changes and Blind Spots

Large trucks have significant blind spots. A truck driver must use mirrors, signals, spacing, and safe lane-change practices. When drivers fail to check blind spots, drift between lanes, merge too quickly, or cut across traffic, smaller vehicles can be sideswiped, forced off the road, or trapped near the trailer.

Unsafe lane-change crashes often happen on interstates, construction zones, frontage roads, and congested highways. In San Antonio, truck traffic on I-35, I-10, Loop 410, and Loop 1604 can create dangerous lane-change situations.

Evidence may include dash video, nearby traffic cameras, vehicle damage patterns, paint transfer, lane markings, witness vehicles, and commercial driver training records.

Following Too Closely and Rear-End Truck Crashes

Following too closely is one of the common causes of truck accidents in stop-and-go traffic. A loaded truck may not be able to stop quickly when traffic slows. If the truck driver is tailgating, distracted, or speeding, the result can be a catastrophic rear-end crash.

Rear-end truck crashes can cause spinal injuries, brain injuries, fractures, vehicle intrusion, and fatal underride collisions. The truck driver may claim traffic stopped suddenly, but that is not always a defense. Commercial drivers are trained to maintain safe following distance because traffic changes are predictable.

Important evidence can include braking data, speed data, dash video, following distance, road conditions, and prior traffic congestion.

Brake Problems, Tire Failures, and Poor Maintenance

Mechanical failure may appear sudden, but many maintenance-related crashes are preventable. Trucks require regular inspections, repair, and maintenance. FMCSA safety resources explain that commercial motor vehicles must undergo periodic inspection at least once every 12 months. Motor carriers must also ensure that vehicles are properly inspected and maintained.

Maintenance-related causes of truck accidents include:

  • worn brakes
  • air brake problems
  • tire separation
  • bald tires
  • steering failure
  • lighting defects
  • broken reflectors
  • coupling problems
  • trailer defects
  • ignored driver inspection reports

If a truck crash involved brake failure or tire failure, the investigation should include maintenance records, inspection reports, repair invoices, driver vehicle inspection reports, photos, and expert inspection of the truck.

Cargo Loading and Securement Problems

Cargo problems can cause or worsen truck crashes. FMCSA cargo securement rules are intended to prevent cargo from leaking, spilling, blowing, falling from a vehicle, or moving in a way that affects vehicle stability.

Cargo-related causes include:

  • overloaded trailers
  • unbalanced loads
  • unsecured cargo
  • cargo shifts on curves
  • falling debris
  • liquid surge in tankers
  • improper tie-downs
  • wrong equipment for the cargo

Cargo problems can lead to rollovers, jackknife crashes, lane departures, and lost-load collisions. In these cases, liability may involve the driver, motor carrier, shipper, warehouse, loading company, broker, or cargo securement contractor.

Jackknife and Rollover Accidents

Jackknife accidents happen when the trailer swings out at an angle from the tractor, often folding across lanes. These crashes may involve sudden braking, slick roads, speed, trailer weight, cargo shift, or driver overcorrection. If your crash involved a folding trailer, our guide to Jackknife truck accident claims explains why these cases require careful reconstruction.

Rollover accidents may involve sharp curves, high speed, high center of gravity, overloaded cargo, soft shoulders, or driver steering errors. Dump trucks, tankers, and concrete mixers can be especially vulnerable because of weight distribution and load movement.

Both jackknife and rollover crashes often require expert analysis of speed, braking, cargo, weather, road design, and vehicle condition.

What Are Common Causes of Dump Truck Accidents?

What are common causes of dump truck accidents? Dump truck crashes often involve blind spots, backing accidents, overloaded beds, shifting material, poor brake maintenance, tire failures, high center of gravity, unsecured loads, unsafe turns, construction zone hazards, and unqualified drivers.

Dump trucks are different from long-haul tractor-trailers. They often operate near construction zones, neighborhoods, city streets, quarries, landfills, and work sites. They may make frequent stops, reverse into tight spaces, drive on uneven ground, and carry heavy materials like gravel, asphalt, dirt, demolition debris, or rock.

Dump truck accident evidence may include:

  • load tickets
  • job-site records
  • construction site video
  • backup camera data
  • spotter procedures
  • maintenance records
  • brake inspection records
  • tire condition
  • route documents
  • driver training files

If a dump truck driver lacked proper training or the company overloaded the truck, those facts may support liability.

CDL Violations and Unqualified Drivers

Commercial vehicles require special knowledge and licensing. A driver may need the correct class of commercial driver’s license, endorsements, medical certification, and training. A driver who is not qualified for the truck or cargo can put everyone on the road at risk.

Our guide to Commercial driver’s license requirements in Texas explains why CDL classes, endorsements, and medical qualifications matter after crashes involving 18-wheelers, dump trucks, tankers, buses, and tow trucks.

CDL-related causes of truck accidents may include:

  • wrong license class
  • missing tanker or hazardous materials endorsement
  • expired medical certification
  • unverified driving history
  • poor training
  • unsafe hiring
  • ignored prior violations

The driver qualification file can become a key source of evidence.

Trucking Company Negligence

Some causes of truck accidents begin before the driver starts the engine. A trucking company may create danger through bad hiring, weak supervision, unsafe dispatch, poor maintenance, ignored complaints, or pressure to violate safety rules.

Company negligence may include:

  • hiring an unsafe driver
  • failing to check driving history
  • ignoring prior crashes or violations
  • failing to train drivers
  • pressuring drivers to meet impossible schedules
  • failing to maintain trucks
  • failing to enforce safety policies
  • allowing overloaded trucks on the road
  • using unqualified contractors
  • failing to preserve records after a crash

This is why truck accident liability often involves more than the person behind the wheel. The motor carrier, maintenance contractor, cargo loader, broker, shipper, or vehicle owner may also be part of the case.

Evidence That Shows What Caused the Truck Accident

Evidence What it can show
ELD data driving time, rest breaks, hours-of-service compliance
Engine control module data speed, braking, throttle, impact timing
Dash camera video lane position, traffic, driver reaction
Driver qualification file licensing, medical status, prior history
Maintenance records brake, tire, light, and repair issues
Cargo documents overloads, load balance, securement problems
Dispatch communications delivery pressure or route instructions
Phone records distraction or calls near the crash
Police report scene facts, citations, witnesses
Accident reconstruction speed, stopping distance, crash mechanics

Truck cases should be investigated early because electronic data and video can be overwritten. Trucks can be repaired, tires replaced, debris removed, and witnesses lost. A preservation letter can demand that the motor carrier keep key records and physical evidence.

What to Do After a Truck Accident

After a truck crash, get medical care, call law enforcement, and document the scene if you can. Photograph the truck, trailer, DOT number, company name, license plates, cargo, skid marks, road conditions, debris, injuries, and witness vehicles. Save medical bills, discharge papers, repair estimates, tow records, and insurance letters.

Our guide on what to do after a truck accident explains the practical steps that can help preserve evidence and documentation after a serious crash.

Avoid giving detailed recorded statements to the trucking company’s insurer before you understand your rights. Commercial insurers often move fast after a crash. Your side should move quickly too.

Who Helps Prove the Causes of Truck Accidents?

A truck accident lawyer helps identify the cause, preserve evidence, investigate responsible parties, and prove damages. In serious cases, lawyers may work with accident reconstruction experts, trucking safety experts, medical experts, vocational experts, and economists.

If the crash happened in Bexar County or nearby, a commercial truck accident attorney in San Antonio can help preserve local evidence, locate video, and deal with commercial insurers. For crashes anywhere in Texas, a Texas truck accident lawyer can investigate statewide truck accident claims.

How the Cause of the Truck Accident Affects Claim Value

The cause of a truck crash can directly affect case value because it changes both liability and damages proof. A rear-end crash caused by a tired driver may be valuable, but the case can become stronger if records show the company scheduled an impossible route, ignored logbook warnings, or rewarded unsafe delivery speed. A tire failure case may change when inspection records show the tire was bald, mismatched, underinflated, or kept in service after prior complaints. A cargo case may expand if bills of lading, scale tickets, or warehouse records show the trailer was overloaded before it left the yard.

This matters because commercial insurers often argue the crash was sudden, unavoidable, or caused by the injured person. The investigation should connect the visible collision to the preventable safety failure behind it. Strong proof may include company safety manuals, driver training records, prior violations, repair invoices, inspection reports, dash camera files, ELD downloads, and witness statements from loaders or other drivers.

The value of a truck accident claim depends on more than the type of collision. The investigation must identify available insurance coverage, the conduct that increased the risk, whether exemplary damages may apply, and the full extent of medical expenses, lost income, impairment, pain, and disruption to daily life.

People Also Ask About Causes of Truck Accidents

What is the number one cause of truck accidents in Texas?

There is rarely one universal cause. Common causes include fatigue, speeding, distraction, unsafe lane changes, following too closely, mechanical failure, poor maintenance, and cargo problems.

How do you prove fatigue caused a truck accident?

Fatigue may be proven with ELD data, driver logs, dispatch records, fuel receipts, toll records, GPS data, delivery timing, phone records, and crash reconstruction.

Can brake failure make a trucking company liable?

Yes. If maintenance records, inspection reports, or expert review show worn brakes or ignored defects, the motor carrier or maintenance provider may be liable.

What causes dump trucks to roll over?

Dump truck rollovers may involve overloaded beds, shifting material, high center of gravity, unsafe turns, soft shoulders, speed, tire failure, or driver inexperience.

Can a cargo loader be responsible for a truck accident?

Yes. If cargo was overloaded, unbalanced, or unsecured, the loader, shipper, warehouse, broker, or motor carrier may share responsibility.

How fast should evidence be preserved after a truck crash?

Immediately. ELD data, dash video, inspection records, maintenance files, and truck condition evidence can disappear without prompt preservation steps.

Are truck accident cases worth more than car accident cases?

They can be, because injuries are often severe and commercial insurance policies may be larger. Value still depends on liability, damages, coverage, and evidence.

What if the trucking company blames me?

Texas fault rules make blame-shifting important. Video, electronic data, witnesses, physical evidence, and reconstruction may help counter unfair fault claims.

Talk to Ried Pecina Trial Lawyers

The causes of truck accidents are rarely simple. A serious crash may involve driver fatigue, unsafe speed, distracted driving, bad maintenance, cargo problems, CDL violations, company pressure, and multiple insurance policies.

Ried Pecina Trial Lawyers can investigate common causes of truck accidents, identify responsible parties, preserve trucking evidence, and fight for compensation after serious Texas truck crashes.

If you or a loved one was injured in a crash involving an 18-wheeler, dump truck, delivery truck, tanker, or other commercial vehicle, contact Ried Pecina Trial Lawyers for a consultation.

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