Tag Archives: Justin P. Schorr

How Much of Your Personal Data is Stored by Infotainment Systems?

Justin Schorr


So, how much of your personal data is stored by infotainment systems and what is recoverable from them?

The investigators at 7 News Boston asked our engineers Robert Kinder, Jr., MS, and Justin P. Schorr, Ph.D., that same question. See the full story here, or contact Justin and Rob via email at experts@forensicDJS.com or by phone at 215-659-2010, to learn more about our infotainment capabilities.

The Reconstruction of a Legend

Justin and Steve

Justin P. Schorr, Ph.D., President, Principal Collision Reconstruction / Transportation Engineer

There are three parts to every collision: the vehicle, the roadway, and the driver. In honor of my father – and following the conceptual writing prompt he loved the most (“let’s see how far we can stretch this analogy”) – this article will take a look at the “great collision of life” and see how our framework applies. Yes, I could use this space, which we are grateful to have been awarded, to gloat about the recent “cease and desist” letter sent to Tesla (which I have been calling for the past 2 years), or to rewrite the ABC’s of the latest trend in crash reconstruction (another one of my father’s favorites). It may not be conventional – but there is no way I am going to pass up the opportunity to gloat about my father to such a distinguished audience.

The Vehicle. My old man was a machine. The vehicle which he drove on a daily basis was 5 foot 10 and 160 pounds – and this was true from the time he was in graduate school until the day he passed away. He used to tell me that he was under 5 feet tall when he graduated high school and then grew 8 inches between high school and college. I held out hope that the same would happen to me, but unfortunately, I am still waiting for 5’8” to turn into anything taller than 5’8”! Not only did his last moments come just after he dismounted his spin bike – but I will always remember the neon yellow runner’s pullover he had been wearing earlier that day. Dad was an athlete. Scratch that, he couldn’t hit a golf ball over 200 yards, and he had the worst wrist shot and slap shot I’ve ever seen. Dad loved to exercise. Much better. At 61 years old, his aerobic endurance was miles beyond my 33-year-old “vehicle,” and he had even completed a marathon (he had run a few) in under 4 hours.

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A U-Turn Dispute: Can it be Resolved with Limited Data?

U Turn Collision

Justin P. Schorr, Ph.D., Principal Collision / Reconstruction Engineer, President of DJS Associates, Inc.

Heading northbound on a sunny day, a stone mason operating a super duty “work” type truck went to execute a U-turn at a signal-controlled intersection. There were no sight distance limitations and no signs indicating that U-turns were prohibited. He testified that while turning from the left northbound travel lane, he was “rear-ended” by a Toyota passenger vehicle, which was also in the left lane, behind him. Simple rear-end collision… right? [Stealing a line from my father which he stole from Paul Harvey and subsequently beat into the ground] “And now for the rest of the story.”

The dispute is as follows:

While the Toyota operator agreed that she was in the left lane and that the truck was making a U-turn – her claim was that the truck began its turn from the adjacent lane (immediately to her right) and then turned across the left lane, cutting her off. In addition to no measurements being recorded at the scene and the absence of any witnesses, by the time the case reached litigation neither vehicle was available for inspection. However, several photographs were taken which showed damage to the vehicles and the point of rest position of the truck. Through the use of the vehicle specifications along with the damage photographs, to-scale three-dimensional computer models of each vehicle was created which accurately reflected the damage profiles shown in the photographs.

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Dr. Justin P. Schorr on Autonomous Cars with Marc Hoag

Dr. Justin Schorr joins Marc Hoag, Dr. Martin Adler (Netherlands), and Dr. Henning Lategahn (Germany) for the Season 3 Finale of Autonomous Cars with Marc Hoag. Their discussion on nearly every angle surrounding autonomous vehicles ranges in topic from technology to societal impacts, and everything in between.

Listen to the podcast here – https://www.podbean.com/media/share/dir-kdzqx-6299ada

Justin P. Schorr, Ph.D., Principal Collision Reconstruction / Transportation Engineer with DJS Associates, can be reached via email at experts@forensicDJS.com or via phone at 215-659-2010.

Was it Road Rage? Can an Engineering Analysis Answer That Question?


Justin P. Schorr, Ph.D, Principal Collision Reconstruction / Transportation Engineer ::::

A collision occurred when a school bus moved from the right lane of a limited access highway onto the rightside shoulder and contacted a disabled vehicle. It was dark and the disabled vehicle on the shoulder was not illuminated. The operator of the school bus testified that a tow truck located in the lane to his left executed a lane change, forcing him off the roadway and onto the shoulder into the disabled vehicle. The operator of the tow truck testified that the disabled vehicle was his intended “pickup,” but as he went to move from the center lane to the right lane to access the disabled vehicle, the school bus was trying to squeeze by him by passing him on the right, resulting in the collision.

Two forms of event data were available for analysis – video from the tow truck and engine control module data from both the tow truck and the bus. This data allowed for an accurate plotting of the speed of both vehicles prior to and at the time of the incident. Since the vehicles occupied the same place at the same time during the collision (i.e. the tow truck was touching the bus), the event data could be correlated such that their relative positions leading up to the collision could be plotted to scale. The video data also included a rearview camera making it so the position of the bus in the right lane as it approached the tow truck (which was initially in the center lane) could be seen. This data confirmed the independent correlation and plotting of the speed data from each vehicle.

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Update: Autonomous Vehicle Legislation

Autonomous Vehicles

Justin P. Schorr, Ph.D., Collision Reconstruction / Transportation Engineer ::::

Recently the United States House of Representatives passed H. R. 3388: “Safely Ensuring Lives Future Deployment and Research In Vehicle Evolution Act” or the “SELF DRIVEAct”.

Here are 5 things to know about that Bill:

1. The purpose of the bill is to create a Federal Standard for Autonomous Vehicle development. The text of the bill reads: “The purpose of this Act is to memorialize the Federal role in ensuring the safety of highly automated vehicles as it relates to design, construction, and performance, by encouraging the testing and deployment of such vehicles.” In the short term, the bill, if signed into law, would amend the United States Code to allow the Federal Government to issue National Standards related to Autonomous Vehicles and the environment surrounding their development, testing and deployment.

For anyone following the regulatory developments surrounding the issue, this comes as no surprise given that nearly all related legislation has included the notion that discontinuity in state and local regulations would serve as physical, economical and developmental “road blocks” in realizing an autonomous driving environment.

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