DJS at the NJAJ Seminar in Atlantic City

Lauren Latzko and Tessa Sulkes at NJAJ seminar in Atlantic City. Booth 407. Stop by and say hello!

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LIDAR: Just What Is It?

Steven M. Schorr, PE, Collision Reconstruction Engineer ::::

Did You Know that… LIDAR stands for Light Detection And Ranging.

It is defined as “A remote sensing method that uses light in the form of a pulsed laser to measure ranges (variable distances) to the Earth. These light pulses—combined with other data recorded by the airborne system— generate precise, three-dimensional information about the shape of the Earth and its surface characteristics.”

LIDAR is the foundation of HDS Laser Scanning which provides engineers and others the opportunity to create accurate three-dimensional environments for use in analyses.

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Industry Update: Pedestrian Avoidance System

Braking systems are becoming an increasingly important feature in cars. First, they play a key role in vehicle safety. Second, they are an integral part of the advanced technology required for automated driving. Roadworthy driverless cars are expected to appear by 2020. First steps in this direction are the many driver-assist systems developed over the last few years that already significantly enhance braking systems today. In addition, driver-assist systems also support emergency braking when the situation calls for it, provide use radar to check the distance to the vehicle ahead and prevent rear-end collisions by means of predictive braking.

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Nighttime Photography in Collision Reconstruction

Nighttime Photography in Collision Reconstruction

Robert T. Lynch, PE, Sr. Collision Reconstruction Engineer ::::

In order to determine whether or not a collision was avoidable, the question that is often posed to the reconstructionist is: What could or could not be seen at the time of the incident?

Answering this question for collisions occurring under daylight illumination is a straightforward approach. The engineer/investigator visits the site and takes photographs from viewpoints of interest that depict the field of view that would have been available to a vehicle operator. Measurements taken during the site inspection compliment the photograph to specify the available sight distance that is visually represented.

However, using photography in nighttime collisions to represent what a driver could or could not see is more involved. Specifically, the lighting conditions at night (vehicle headlights, streetlights, lane striping, etc.) play a large role in determining when an object/vehicle/pedestrian presents itself as a hazard, and thus, play a critical role in determining whether or not a collision was avoidable.

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Woman struck by Boogie-Boarder

Tom J. Griffiths, ED.D., Aquatics Expert ::::

After checking into her hotel with her extended family, and spending considerable time on the beach observing the ocean and taking pictures, the plaintiff, a non-swimmer, was injured when she was struck by a boogie boarder shortly after she entered the water.

The plaintiff testified that she was enjoying the ocean waves by turning her back on them as they broke on her. When she did venture into the water, she spent most, if not all her time in knee deep water. The plaintiff testified that she observed the lifeguards on duty, some of the signs, and that she noticed the female boogie boarder repeatedly catching and riding waves.

The two lifeguards stationed nearby combined for nearly 50 years of lifeguarding experience on the shore. They were also both professional educators during the academic year.

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Deadly Machines

William Gulya, Jr., Excavation and Construction Site Safety Expert ::::

The case involved an employee (plaintiff) who was working at a residential construction project for the installation of a cable conduit. He was operating and/or working with an Astec Maxi-Sneaker Series C Trencher with a Hydra-Borer attachment.

The scope of work was, in general, to bore under a driveway so that a Fios cable could be installed. The employee was standing at the side of the trench, using a shovel to guide the horizontal direction of the rod while applying force with his foot on the rod to counter the forces that would cause the drilling rod to change direction. Shortly after the horizontal drill began, the employee’s pant leg was caught by the rotating drilling rod. It entangled his right leg, which resulted in severe injury, and ultimately amputation of the employee’s right leg above the knee.

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