Traffic Signal Accident Investigations: Using Forensics To Solve a Case of He Said/She Said
When the facts of a car accident case are unclear, disputes can arise in which each driver blames the other for running a red light. In such scenarios, forensic accident engineers become essential in uncovering the factual basis of the incident.
These experts utilize traffic light timing data, signal diagrams, and vehicle Event Data Recorder (EDR) data to reconstruct intersection collisions. Traffic signals can function under various conditions, either in a free cycle (uncoordinated) or a fixed cycle (coordinated). By analyzing vehicle movements in sync with precise signal phase changes, forensic engineers can determine who had the right-of-way, often serving as expert witnesses to establish liability in legal proceedings.
At Qforensics, our experienced engineers consider a variety of factors, including signal programming, vehicle speed, and detection systems (e.g., cameras and sensors) to determine the light’s status at the time of impact. This analysis is vital for resolving cases where there’s disagreement over which vehicle had the green light.
To reconstruct an intersection collision, a forensic engineer can retrieve data from the vehicle’s EDR. For example, one vehicle might show it entered the intersection at a certain speed and without braking until after the collision. The forensic engineer will then review the traffic signal timing at the intersection and calculate the exact moment the signal changed from yellow to red. This information plays a critical role in determining which driver had the right-of-way.
Such critical data can provide legal and claims professionals with a clear understanding of what happened during a traffic signal accident. It transforms a “he said/she said” situation into a more objective, evidence-based conclusion about who unlawfully entered the intersection, potentially altering the dynamics of negotiations. Unraveling the complexities of an incident can be challenging, but that’s where experienced forensic engineers make a critical difference. We go beyond simply collecting evidence; we uncover the essential facts that can significantly impact a case. As impartial third parties frequently retained by attorneys, insurance companies, and other stakeholders in litigation, Qforensics provides objective, science-based analysis.
About Qforensics
Quality Forensic Engineering, LLC is a full-service forensic engineering firm providing engineering support to clients in accident reconstruction, biomechanics, fire investigations, patent litigation analysis, premises liability, product liability, and tire failure analysis. We use the latest technology and industry-proven techniques to provide thorough analysis, expert testimony, and conclusions for the most difficult engineering questions. Our forensic engineers support clients throughout the U.S. View our locations
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