Forensic Engineers and Consultants

Tag Archive: collision scene analysis

  1. 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…)

  2. The Pressure to Keep Rolling (Part 2)

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    One of the first safety concerns for your vehicle should be your tires. The tires on your vehicle or trailer maintain contact with the roadway and assist you in getting to your destination safely. So how do you know that your tires are proper for your vehicle, are being well-maintained, and beyond the obvious threat of tire failure, why is this important to know? (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. Why investigators should have “Scaled Diagrams” of scenes?

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    When it comes to diagramming a crash scene, there are several methods to accomplish the task. Forensic Mapping, (locating, positioning, and documenting the evidence of a collision scene to scale) is essential to having the answers to the questions “Who, What, Where, When, and Why?”. Photographs do a great job showing what the investigators saw post collision; yet they lack scale and the ability to describe pre-collision movement. Having a computer aided diagram (CAD) of the collision scene goes much further than the pictures can; here is why.

    basic intersectionA scale diagram gives the full overview of a collision scene from either a 2D or 3D point of view. Being able to see how things lined up, how they came together and how they parted helps explain the events within a crash. When a scene can be viewed from top down or any angle, that helps relay the facts. The investigator, judge, or jury will get (more…)

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