Forensic Engineers and Consultants

Archive: Truck

Belted or Unbelted? That is the Question!

Did the driver or passenger do what they could do to protect themselves by wearing their seatbelt? There are ways to determine if the safety-belt 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 safety-belt status. This is a great way to start an investigation but should not be solely considered as the fact that the belt was used; other evidence needs to be gathered to support the data. Read More

Author

Al Duncan
a road crest at the top of as hill

Over the Hill

Author

When traveling down the roadway, a lot of things must be considered. While things that can be seen are obvious concerns, things that cannot be seen pose a threat too. Blind hillcrests leave drivers guessing “what’s on the other side”. Regardless of their intentions, before drivers make a maneuver, they should pay extra attention to blind hill crests. In a collision that occurs just over a hillcrest, where one driver is attempting to continue straight as the other is attempting to make a left-hand turn, many times the investigating officer arrives at a common conclusion. Failure to yield right of way charges are often applied to the driver making the turn; however, are these charges applicable? Read More

Placard location ALD

The Pressure to Keep Rolling (Part 2)

Author

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? Read More

Green Hotrod with Fancy Rims and Huge Tires

The Pressure to Keep Rolling – Part 1

Author

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. Read More

3D Collision Impact Angle

Why investigators should have “Scaled Diagrams” of scenes?

Author

When it comes to diagramming a crash scene, there are several methods to complete 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 Read More

Right Turns Only main photo

Right Turn Only

Author

 

In my 25 years of investigating collisions and traffic related incidents, one thing I have noticed repeatedly is that right turns are considerably better than lefts. I know it is obvious and sometimes seems a little petty; however, when it comes to the safety of your family, it is a big deal. Since I am currently in the process of teaching my second child how to drive, I am harping on vehicle safety a lot and this is one of the many practices I teach. I have instilled in my children (and my wife has picked up on it as well) that they should always plan out their route and, in doing so, make right turns instead of lefts whenever possible. The “Right Turn Only” practice will make your travels safer.

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