Single-vehicle accidents, which involve only one vehicle, may appear straightforward at first glance. However, these incidents can give rise to complex legal questions about fault, liability, and insurance coverage. In the state of Washington, where weather conditions, terrain, and traffic patterns all contribute to road safety, it helps to be aware of the underlying causes and potential liability in single-vehicle accidents.

If you or someone you love has been injured in a single vehicle accident, you should consult with a skilled and experienced vehicle accident claims attorney in Washington to discuss your legal options for financial recovery. 

What are Single-Vehicle Accidents?

Single-vehicle accidents include crashes where only one vehicle is involved. Examples include:

  • A driver colliding with a guardrail or telephone pole
  • A vehicle veering off the road due to swerving to avoid an animal or object
  • A car hydroplaning in heavy rain and crashing into a ditch
  • A vehicle rolling over without colliding with another vehicle

Contrary to common assumptions, the driver in a single-vehicle accident is not always automatically at fault. Liability in a single-vehicle crash can rest with a number of different parties depending on the contributing factors.

Causes of Single-Vehicle Accidents in Washington State

Washington’s geography, weather, and road infrastructure can all play a role in increasing the risk of single-vehicle accidents. Here are the most prevalent single-vehicle accident causes.

Hazardous Road Conditions

Inclement Weather

Washington is known for its rainy seasons, foggy mornings, and occasional snow and ice, particularly in the Cascade Mountain region. Slick roads can cause vehicles to slide, hydroplane, or veer off the road entirely. Poor visibility during fog or heavy rain can also lead to overcorrections or misjudged turns.

Poor Road Maintenance

Government agencies have a legal duty to maintain roads in a reasonably safe condition. Failure to repair potholes, clean debris, replace faded lane markings, or remove fallen tree branches may create dangerous conditions for drivers. If a vehicle swerves or crashes due to these road hazards, the responsible municipality or state agency may be held liable.

Mechanical Failures and Vehicle Defects

Not all accidents are caused by driver error. Sometimes, a vehicle malfunction is to blame.

Tire Blowouts and Brake Failures

Defective tires or improperly installed brake systems can cause a loss of vehicle control, particularly at high speeds or on steep terrain. If a tire suddenly bursts or brakes lock up, the vehicle may swerve into roadside obstacles or overturn.

Manufacturing Defects

If the vehicle or any component part (e.g., steering column, airbag, suspension) is defective due to manufacturing or design flaws, the vehicle’s maker or parts manufacturer may bear responsibility. These types of claims typically fall under Washington’s product liability statutes, governed by RCW 7.72.

Driver-Related Causes

Distracted Driving

Although no other vehicle may be involved, distraction can still play a significant role in single-vehicle crashes. A driver looking at a cell phone, adjusting GPS, or eating behind the wheel may veer off the road and strike an object.

Driving Under the Influence

Drugs and alcohol impair judgment, reaction time, and motor skills. Drivers under the influence are more likely to miscalculate curves, fail to notice warning signs, or overcorrect, leading to single-vehicle crashes.

Fatigue and Drowsy Driving

Falling asleep at the wheel is another leading cause. Washington’s long rural roads and highway stretches can lead to driver fatigue, particularly for commercial truck drivers or those working late hours.

Other Common Causes

Avoiding Animals or Pedestrians

Washington is home to diverse wildlife, and it’s not uncommon for animals like deer to dart across highways, especially in wooded or rural areas. Swerving to avoid hitting an animal can lead to a collision with a tree or ditch. The same applies to trying to avoid a pedestrian, cyclist, or another hazard that suddenly appears on the road.

Construction Zones and Improper Signage

Temporary construction zones generally feature lane changes, narrowed passages, uneven pavement, or poorly marked detours. If contractors fail to place adequate warning signs or barriers, it can confuse drivers and cause accidents. In such cases, the contractor or construction company may bear partial or full liability.

Aggressive Driving and Overcorrection

Even in single-vehicle scenarios, aggressive driving can play a role. Speeding around curves, tailgating, or quick lane changes can force a driver into a situation where they lose control. Overcorrecting when veering off the pavement is also a frequent cause of rollovers, especially in SUVs or trucks with a higher center of gravity.

Who Is Liable for a Single-Car Accident?

Contrary to popular belief, liability in single-vehicle crashes is not limited to the driver. Depending on the facts, several parties may share or bear full responsibility.

The Driver

In many cases, the driver is solely responsible. If the crash was caused by speeding, texting, driving under the influence, or falling asleep at the wheel, the driver is liable for any damages, including injuries to passengers. Insurance companies often view single-vehicle accidents as “at-fault” claims when there is no evidence of outside interference.

However, legal representation from an experienced law firm, such as Jacobs and Jacobs Personal Injury Law Group may help a driver argue against presumed fault if other contributing factors (like poor road conditions) played a role.

Government Entities

Under Washington law, government entities can be held responsible for unsafe road conditions. If the accident occurred due to potholes, poor signage, lack of guardrails or lighting, or inadequate maintenance of roads or storm drains, the injured party may pursue a claim under Washington’s Tort Claims Act. 

However, the statute requires strict compliance with notice requirements (RCW 4.92 for state agencies and RCW 4.96 for local governments). A claim must usually be filed within three years of the accident.

Third-Party Drivers or Road Users

Even if only one vehicle crashes, the actions of another driver may have contributed. For example:

  • A car cuts off another driver, causing them to swerve and crash
  • A driver makes an illegal U-turn or lane change, forcing evasive maneuvers
  • A pedestrian darts into the road, leading to an overcorrection

If evidence (e.g., dash cam footage, witness testimony) shows that another party’s negligence caused the crash, that person may be liable even if their vehicle did not physically collide with the other.

Vehicle or Parts Manufacturers

Product liability claims can be made under Washington’s Product Liability Act (RCW 7.72) if a defective vehicle or part caused the crash. The plaintiff must show the defect was unreasonably dangerous and existed at the time the product left the manufacturer. Examples include:

  • Brake failure due to faulty design
  • Unintended acceleration due to electronic glitches
  • Tire tread separation due to poor manufacturing

Employers (in Commercial Vehicle Crashes)

If a commercial driver crashes while working (e.g., a delivery truck), the employer may be liable under the doctrine of respondeat superior. Washington courts recognize that employers may be responsible for the actions of employees acting within the scope of their employment.

If poor training or improper maintenance contributed to the crash, direct liability claims may be brought against the employer.

Private Property Owners

If a driver crashes on private property due to hidden hazards (e.g., unmarked drop-offs, poorly maintained gravel roads), the property owner may be liable under Washington premises liability law. This is particularly relevant in parking lots, driveways, or private access roads.

Photo of Car Crash

Comparative Fault in Washington

Washington follows the pure comparative fault rule (RCW 4.22.005). Even if the driver is partially at fault, they may still recover damages from other responsible parties, although their compensation will be reduced by their percentage of fault.

For example, if a court finds the driver was 40% at fault due to distracted driving, and the state was 60% at fault due to an unmaintained road hazard, the driver could recover 60% of the total damages.

Insurance Considerations in Single-Vehicle Crashes

  • Personal Injury Protection (PIP): Washington requires insurers to offer Personal Injury Protection coverage. PIP pays for medical expenses and some lost wages regardless of who was at fault.
  • Collision Coverage: Drivers with collision coverage can recover repair costs for their vehicle after a single-car crash. However, this typically involves paying a deductible, and rates may increase.
  • Uninsured/Underinsured Motorist (UM/UIM): If a phantom driver (someone who causes the accident but flees the scene) is to blame, UM coverage may apply. This coverage is optional but highly recommended in Washington.

Injured in a Single-Vehicle Accident? Let Our Washington Car Accident Lawyers Take It From Here

If you or a loved one has been injured in a single-vehicle accident, you don’t have to face the aftermath alone. At Jacobs and Jacobs, we have spent decades helping injured people across Washington uncover the truth behind their accidents and hold the negligent parties liable for damages. 

Our experienced Washington car accident attorneys investigate every angle, whether it’s a negligent municipality, a defective auto part, or an uninsured motorist, and fight to recover maximum compensation for injured victims.

We offer flexible appointments in person, by phone, or Zoom, and we will even come to you if you cannot come to us. You pay no fees unless we win your case. To schedule your free case evaluation, call us 24/7 at 253-845-0577 or contact us online.