Forensic Engineers and Consultants

Tag Archive: accident reconstruction

  1. The Pavement Tells the Story: Reading Evidence from a Motorcycle Crash

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    What can be determined from a motorcycle’s skid mark and the roadway evidence it left behind? The obvious, that the motorcycle crashed; but what more? From a recent case, starting with the pre-impact skid mark, a lot was determined about the driver’s (and passenger’s) input into the crash. A single skid mark started at the beginning of the collision location, a common piece of evidence at a motorcycle crash. Taking that mark and analyzing it, several things were determined. (more…)

  2. Belted or Unbelted? That is the Question!

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    Did the driver or passenger do what they could do to protect themselves by wearing their seatbelt? There are ways to determine if the safetybelt was being used. Most modern vehicles have a computer-controlled safety system that makes decisions based on an algorithm. That algorithm uses information such as change in speed and the direction of force to determine what to do. That data not only tells how fast the vehicle was traveling and if the brakes were applied, but also records the driver’s or passenger’s safetybelt status. (more…)

  3. The Pressure to Keep Rolling – Part 1

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    Over my years of law enforcement, crash investigation, and collision reconstruction I have come to become more and more particular about my tires. I have watched people purchase tires from these “used tire stores” and when I buy my tires I can understand why; quality tires are expensive. The question of how old is that tire and how was it serviced before it ended up for sale is a huge concern. (more…)

  4. Are 10 Minutes Worth the Risk?

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    Before retiring as a S.C. State Trooper, and to this day, people routinely ask me, “How fast can I go before I get a speeding ticket?” Let me start by saying one mile per hour over the speed limit can subject you to a speeding ticket. While different officers have different standards, it is easier to talk your way into a ticket than to talk your way out of one. So, much like the number of licks to get to the center of a Tootsie Roll Tootsie Pop, the world may never know an exact answer to how fast you can go over the posted limit without a citation. A better question is ‘What is the benefit of exceeding the posted limit?’ (more…)

  5. Fire Investigation Points to Design Failure.

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    Defects that cause problems in machines are categorized into two different concepts. Manufacturing defect is a term that applies to a situation where the defect was unintended. For example, a part was installed that did not meet the designer’s specifications or quality. A design defect is another matter. Design defect is a term that applies to a situation where the defect resulted from a purposeful decision or by failing to investigate or heed available design criteria on the part of a designer or builder. (more…)

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