Personal Attention & Quality Legal Service Since 1961
Rear-end collisions are among the most recognizable types of car accidents. One vehicle slows or stops, and another vehicle crashes into it from behind.
Because of how these collisions occur, many people assume the answer to the question of fault is simple: the rear driver is always responsible.
That is not necessarily the case.
Arizona law requires drivers to maintain a reasonable following distance, which frequently makes the trailing driver's actions a central part of a rear-end collision investigation. However, determining rear-end collision fault in Arizona still depends on the circumstances surrounding the crash. In some accidents, another driver may have contributed to what happened.
At Skousen, Gulbrandsen & Patience, PLC, we help Arizona accident victims understand how liability is determined and what evidence may be important when fault is disputed.
No Arizona statute simply states that the rear driver is automatically liable every time one vehicle strikes another from behind.
Arizona does, however, impose a clear responsibility on drivers who are following other vehicles.
Under Arizona Revised Statutes § 28-730, a driver must not follow another vehicle more closely than is reasonable and prudent. The law requires drivers to consider vehicle speeds, traffic, and highway conditions when determining a safe following distance.
That requirement helps explain why the rear driver is frequently the focus of a rear-end accident investigation.
Drivers need enough space to respond when traffic slows or stops. A reasonable distance on a clear, dry roadway may be different from what is reasonable during heavy traffic, reduced visibility, or poor roadway conditions.
The circumstances matter.
Many rear-end accidents occur because the trailing driver does not have enough time or distance to avoid the vehicle ahead.
Several driving behaviors can contribute to this problem.
Tailgating reduces the amount of time available to react when the vehicle ahead brakes.
Arizona's following-distance law does not establish one universal number of feet that applies to every ordinary passenger vehicle situation. Instead, A.R.S. § 28-730 uses a "reasonable and prudent" standard that accounts for speed, traffic, and highway conditions.
A driver looking at a phone, adjusting navigation, eating, or otherwise diverting attention from traffic may fail to notice that vehicles ahead have slowed.
Even a brief distraction can matter when traffic conditions change quickly.
A driver does not necessarily need to be traveling dramatically above the posted speed limit for speed to become relevant.
Traffic congestion, weather, visibility, and roadway conditions can all affect how much distance a driver needs to stop safely.
Sometimes a driver sees traffic slowing but reacts too late.
The investigation may examine braking, vehicle damage, witness accounts, roadway evidence, video, and other information to determine what happened before impact.
Yes. The fact that one vehicle was struck from behind does not make the front driver's conduct irrelevant.
Consider a situation where a vehicle suddenly moves into another driver's lane with inadequate space and immediately brakes. The trailing vehicle may strike the first vehicle from behind, but the lane change could become an important part of the liability investigation.
Other circumstances may involve questions about:
These examples do not automatically make the front driver responsible. They demonstrate why the physical location of the damage alone does not always tell the entire story.
A proper investigation considers what each driver was doing before the impact occurred.
Rear-end accidents can involve shared responsibility.
Arizona follows a comparative negligence system. Under Arizona Revised Statutes § 12-2505, a claimant is not necessarily barred from recovering damages simply because the claimant shares some fault. Instead, recoverable damages can be reduced in proportion to the claimant's relative degree of fault.
For example, assume an injured person establishes $100,000 in damages but is determined to have been 20 percent responsible for the collision.
Under Arizona's comparative negligence framework, the damages could be reduced by 20 percent, leaving $80,000.
This is why disputes about fault percentages can have significant financial consequences.
Arizona law also addresses how fault is allocated when several people contributed to an injury. A.R.S. § 12-2506 generally provides that each defendant is responsible for damages according to that defendant's percentage of fault, subject to statutory exceptions.
A rear-end accident involving three, four, or more vehicles can therefore become considerably more complicated than a basic two-car collision.
Evidence is particularly important when the drivers disagree about what happened.
Several sources can help establish how a rear-end collision occurred.
Damage patterns can provide information about where the vehicles made contact.
Damage to the front of one vehicle and rear of another may confirm the general type of collision, but additional evidence may still be needed to understand the events leading to impact.
Video can provide some of the strongest evidence in a disputed accident.
Potential sources include:
Video may show lane changes, braking, traffic conditions, vehicle movements, or other events that occurred immediately before the collision.
Because some recording systems automatically overwrite older footage, potentially useful video should be identified as soon as possible.
Independent witnesses can be especially valuable when drivers provide conflicting accounts.
A witness may have seen whether a vehicle suddenly changed lanes, whether traffic had been stopped for an extended period, or whether another vehicle contributed to the collision.
Responding officers may document vehicle positions, driver statements, witness information, roadway conditions, and other observations.
A police report can become an important piece of the overall evidence, although fault in a civil injury claim may involve additional evidence and legal analysis.
Modern vehicles can contain electronic information that may be relevant in certain serious collisions.
Depending on the vehicle and circumstances, available data may help investigators evaluate factors such as speed, braking, or other vehicle activity.
Not every rear-end accident requires this level of investigation, but it can become important when injuries are serious or liability is heavily disputed.
A chain-reaction collision can create difficult questions about who caused what.
Imagine four vehicles stopped or slowing in traffic. The fourth vehicle strikes the third, pushing it into the second, which is then pushed into the first.
The drivers in the first vehicles may experience multiple impacts. Statements about who struck whom can become confusing.
In another scenario, one driver may have already rear-ended the vehicle ahead before another vehicle joins the collision.
Arizona's fault-allocation rules become particularly relevant in these cases because more than one person's actions may have contributed to the resulting injuries or property damage.
Under A.R.S. § 12-2506, the trier of fact considers the fault of people who contributed to the alleged injury or damage when allocating percentages of fault, subject to the statute's requirements.
Determining the sequence of impacts can therefore be an important part of investigating a multi-vehicle rear-end collision.
A rear-end crash does not have to occur at highway speed to cause an injury.
The sudden forces created by an impact can cause the body to move rapidly forward and backward or strike parts of the vehicle.
Potential injuries include:
Symptoms may not always appear immediately.
Someone who feels relatively normal at the accident scene may experience pain, stiffness, headaches, dizziness, or other symptoms later. Seeking appropriate medical evaluation after an accident can help identify injuries and create documentation connecting treatment to the collision.
Your health and safety should come first.
If you are involved in a rear-end collision:
Avoid making assumptions about fault at the scene.
You may not yet know everything that contributed to the collision. Another driver's statements, video evidence, witnesses, or information from a multi-vehicle sequence may later provide additional context.
An insurance company's initial liability determination does not eliminate the need to examine the evidence.
If an insurer claims you contributed to the accident, ask what evidence supports that conclusion.
Photos, video, witnesses, vehicle damage, police documentation, and other records may provide a different account.
The percentage of fault assigned to you can matter because Arizona's comparative negligence system allows damages to be reduced according to a claimant's relative degree of responsibility.
For someone who suffered substantial injuries, even a relatively small dispute over fault can represent a significant amount of money.
Not every rear-end collision requires an attorney.
Legal assistance may become particularly important when:
An attorney can investigate the collision, communicate with insurance companies, gather evidence, evaluate applicable Arizona law, and help determine which parties may share responsibility.
Rear-end collision fault in Arizona should be determined from the facts of the accident, not simply from an assumption that one driver is always responsible.
Arizona law requires motorists to maintain a reasonable and prudent following distance based on traffic, speed, and roadway conditions. At the same time, Arizona's comparative negligence system recognizes that more than one person can contribute to an accident.
At Skousen, Gulbrandsen & Patience, PLC, we represent people injured in motor vehicle accidents throughout Phoenix, Mesa, and communities across Arizona. When liability is disputed, our attorneys can investigate what happened, preserve available evidence, and help clients understand how Arizona's fault laws may affect their claims.
If you were injured in a rear-end collision and have questions about who was responsible, contact our team to discuss your situation and legal options.
Photo by Viktoria B.