Auto Accident Reconstruction

April 8, 2022
Tom McCutcheon
Car Accidents
Serving North Alabama

It's All About The Crash Data

Questions such as, “How fast was the vehicle going at impact?” or “How much did the vehicle slow during the locked-wheel braking?” or “At what angles did the two vehicles collide?” can be answered by reconstructing the accident after a thorough evaluation of the available information.

How Accident Reconstruction Works

Sensors, Air Bags, Forensic Engineers and More

Accident reconstruction is the process using scientific methodology to determine the circumstances, mechanics, and other contributing factors associated with a collision. Forensic engineers look at the damage to the car and the surrounding area where the accident took place to determine the basic facts of speed, braking, and direction of travel. This is well-established, accepted technology.

Most modern passenger cars are equipped with “event data recorders” (EDR) that are linked to the airbag sensors. These modules record several seconds of data prior to the impact if the airbags deploy. This data includes speed, braking, throttle position and often the amount of slip or yaw.

Commercial vehicles usually have two “black boxes” that provide a history of the vehicle’s travel for up to seven days prior to impact. These data boxes are not linked to airbag deployment and may be “written over” if the vehicle is used after the accident, thus, losing the data that would be pertinent to the accident. Accident lawyers will send a notice to preserve the vehicle’s electronic data if it is in danger of being lost.

Visual clues like skid marks left by tires, scuff marks left by the undercarriage of a vehicle or the condition of the rims if the tires deflate are important to the analysis. Debris such as side mirrors and broken glass are clues to speed and direction as well.

Bulb filaments and switches can be analyzed to determine if in fact lights or turn signals were in use at the time of the accident. Experts use the term “conspicuousity” to describe how well a vehicle can be seen through reflective strips, sidelights, as well as headlights, and taillights. Although the visibility of a vehicle through lighting is generally more important in a night-time accident than a day-time accident.

Accident reconstructions bring together the factors that led up to the accident and help visualize how that accident happened. Accident reconstructions are important tools and techniques that can make the difference in determining who actually caused an accident or collision.

Buckle up, drive safely and as always, your referrals are appreciated! (256) 333-5000