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March 2007 - Accident Reconstruction Newsletter
Michelle wears many hats here at the ARC Network: she helps research and prepare this newsletter, she updates the daily news, she manages the database system, helps with membership and renewal, and a ton of other stuff. However, one of the tasks that she performs (that I am very thankful for) is answering the phone here at the ARC Network. Most of the time I am available to speak on the phone, but sometimes I am not - this is where Michelle can help. She understands the ARC Network, the membership structure and can help assist you on a wide variety of topics. By her helping take phone calls, allows me to work closer on developing new areas for the ARC Network. 2007 ARC-CSI Crash Conference - Early Registration Ends May 1st!
As a bonus this year, EFI Global is sponsoring a low speed testing segment. The engineers from EFI Global and Biomechanic Research and Testing will conduct a series of low speed crash tests (prior to the ARC-CSI Crash Conference) focusing on bumper damage with rigid bumpers and a trailer hitch. Billy Cox, Jr. will be presenting the data on Thursday June 7th. All of the data collected will be included on the conference data DVD and distributed to all conference attendees on Thursday June 7th. NEW Crash Testing ACTAR has just confirmed they will be hosting an ACTAR test on Sunday June 3, 2007 at the Palace Station Hotel. Those wanted to test into ACTAR should contact ACTAR to sign-up - www.actar.org. The ARC-CSI Crash conference has been confirmed for 21 ACTAR CEUs. EARLY REGISTRATION
ENDS SOON... Complete information on Crash Data Retrieval I GOT HIT LLC is owned and maintained by Scott Baker, the same person who owns and operates the ARC Network. Just because it is a different name doesn't mean the dedication to providing the best service has changed. We are determined to build a strong network within the entity of I GOT HIT LLC to sell CDR hardware/software, educate the community with this technology and help bring this aspect of Accident Reconstruction to the forefront. Please visit our redesigned web site at www.cdr-system.com. This newly designed web site adds the ability to purchase a new CDR System, replacement parts and updates. We have the entire CDR product catalog online complete with pictures for each part of the system. 2.9 SOFTWARE UPDATE NOW
SHIPPING This new software release provides you with the ability to retrieve EDR data from 2007 GM vehicles, 2005-2007 Ford Crown Victoria, Mercury Grand Marquise, Lincoln Town Car Limousine and 2006 FORD F250/F350/F450/F550 and Ranger pick ups. This is a software only update and requires either a 1-year software subscription or a 3-year software subscription. Buy 2.9 Update Online: USA Orders | Canada Orders Motorcycle Specs Database Now that we have more resources available, we are determined to continue developing the best network for accident reconstruction along with the best tools to assist in your daily case requirements. Please let us know what you would like to see added to the ARC Network. With over 850 members and growing every day, we are the largest organization for accident reconstruction and traffic accident investigation. Thank you again for supporting the ARC Network! Sincerely, Scott Baker |
Inside this Issue:
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Costs of Injuries Resulting from Motorcycle Crashes: A Literature Review Introduction Good public policy decisions require accurate facts. But the challenges faced by the lay public when trying to read, understand, and use academic literature can often result in misinformation. Rightly or wrongly, findings about motorcycle safety, the value of helmet use, and who pays for helmet non-use can call forth controversies rivaling the findings on the causative link between gun proliferation and firearm deaths, between smoking and cancer, or between heavy drinking and injury. The National Highway Traffic Safety Administration (NHTSA) commissioned this independent study, whose primary purpose is to summarize and critically review the literature on motorcycle injury costs published in the 1990s. The review supplements an earlier review of helmet effectiveness studies (US General Accounting Office 1990 summarized and reviewed in Appendix). It describes what we know, the gaps in what we know, and what we need to learn. It emphasizes studies of prevention approaches, including helmets, protective gear, and rider training. It also focuses on who pays the costs of motorcycle injury. Decision-makers,safety advocates, and motorcyclists need an accessible, scientifically credible review of the literature. This review addresses that need by identifying the best studies and summarizing their results. It also offers a handy, understandable summary of flawed studies and documents their major problems. The Emerging Risk of Fatal Motorcycle Crashes with Guardrails Abstract The objective of this study is to examine the issue of fatal motorcycle collisions with guardrail based on U.S. accident statistics. Motorcycle crashes were found to be the leading source of fatalities in guardrail crashes. In 2005 for the first time, motorcycle riders suffered more fatalities (224) than the passengers of cars (171) or any other single vehicle type involved in a guardrail collision. In terms of fatalities per registered vehicle, motorcycle riders are dramatically over represented in number of fatalities resulting from guardrail impacts. Motorcycles compose only 2% of the vehicle fleet, but account for 42% of all fatalities resulting from guardrail collisions. Motorcycle-guardrail crash fatalities are a growing problem. From 2000-2005, the number of car occupants who were fatally injured in guardrail collisions declined by 31% from 251 to 171 deaths. In contrast, the number of motorcyclists fatally-injured in guardrail crashes increased by 73% from 129 to 224 fatalities during the same time period. Over two-thirds of motorcycle riders who were fatally injured in a guardrail crash were wearing a helmet. Approximately, one in ten motorcyclists striking a guardrail were fatally injured – a fatality risk over 80 times higher than for car occupants involved in a collision with a guardrail. Human Subject Crash Testing: Innovations and Advances Edited by: Lawrence S. Nordhoff, Jr., Michael D. Freeman, and Gunter P. Siegmund Human Subject Crash Testing: Innovations and Advances includes 42 of the most important historical and current studies which used living human subjects in frontal, side, and rear-end impacts. Covering more than 50 years of research (from 1955through 2006), the book includes numerous landmark SAE papers, as well as papers from other conference proceedings .Papers were chosen based on criteria that included quality and rigor of methods, uniqueness, number of subjects, and long-term reference value. This book also features a comprehensive bibliography, which contains brief summaries of other relevant human subject crashtest studies that are not included in the book. Review of Helmet and Helmet Law Effectiveness Studies In the last Accident Reconstruction Newsletter we posted an article that was a tad-bit contorversial, so here are some more artilces that should be read in conjuction with the last newsletter... Overview A critical review of six studies involving the effectiveness of helmets: Helmet Effectiveness Studies based on Variants of Correlation Analysis Which Support Motorcycle Helmet Effectiveness , Helmet Effectiveness Studies Based on Variants of Correlation Analysis Which Partially or Fully Contradict the Effectiveness of Helmets , Helmet Effectiveness Studies Using Regression Analysis , Other Methodologies Used to Estimate Helmet Effectiveness , Cost-Benefit Studies of Helmets and Helmet Laws , Studies Supporting the Risk Compensation Hypothesis for Motorcycle Helmet Laws Development of Point Mass Occupant Injury Criteria Using Event Data Recorders Abstract This paper presents an estimate of the probability of serious occupant injury in frontal crashes based on vehicle kinematics information. Occupant injury risk is developed by modeling the human as a point mass and computing the occupant impact velocity (OIV) using the flail space model. Event Data Recorder data provides vehicle kinematics information for real world crashes with known injury outcomes. A data set of 211 cases is used for methodology development and preliminary insight to the injury prediction capability of the metric. Using logistic regression, injury risk curves are generated for all data, a belted occupant subset and an unbelted occupant subset. Based on the models, an occupant restrained by an airbag and safety belt is found to have a lower risk of injury than an occupant only restrained by an airbag. A 50% probability of serious injury is found to correspond to an OIV of 11.2 m/s and 15.9 m/s for unbelted and belted occupants, respectively. Collision Magazine
Collision Publishing is proud to announce that we are preparing to go to press with the next issue of Collision magazine. This will mark the first issue of our second year! The first year was met with great success and we strive to continue to bring you the best information as it relates to crash research, accident reconstruction and traffic accident investigation. Industry Partners
We would also like to welcome IAARS as the newest Industry Partner of Collision. As an Industry Partner, IAARS becomes more involved the the magazine and also can offer it's members a discounted subscription rate. If you are an IAARS member and would like to receive Collision at the discounted rate, please contact IAARS directly - www.iaars.org. If you are thinking about joining IAARS, now is great time. NAPARS continues to be our Premier Industry Partner, offering Collision to all of it's membership at no additional charge. Simply pay the annual dues to NAPARS and you will receive Collision as part of your membership. For information on becoming a member of NAPARS, please visit their web site www.napars.org The ARC Network is also an Industry Partner of Collision. The ARC Network offers Collision free to all Police Agency members and Platinum members. For more information on becoming a member of the ARC Network please visit www.accidentreconstruction.com/members. If you do not wish to join an organzation to receive Collision, you can always subscribe online at Back Issues Still Available Logistics & Management II, Inc. Receives Event and Trip Data Recording Order Copiague, New York (March 20, 2007) --- Logistics & Management II Inc. (L&M II) announced today that it has been selected by Global Liberty Insurance Company of New York (GLINY), to supply its patented MACBOX III- (Mobile Acceleration Camera/Crash BOX) Dual System for use with’s Livery and Limousine Fleets with an exclusive for the State of New York. L&M II will be supplying their MACBOX III full Non-Video Customized Wireless Services and Video Capture triggered upon an event tailored to GLINY’s requirements. The dual system will be installed at GLINY’s designated locations by L&M II’s installation group. L&M II offers a Modular Service Platform on which to deploy Safety, Security and Fleet Management applications that meet the business objectives of fleet operators of small and large fleets and operators of all major classes of vehicles and the insurance industry. The foundation of this Modular Service Platform is the most flexible and advanced Event & Data Recorder that includes trip data, speed vs. speed limit, multiple video source inputs, Global Positioning,Geo-Fencing, tri-axial accelerometer triggers, multiple network access methods, advanced mobile broadband communications and more. L&M II’s partner Vehicle Monitoring Technologies, Inc., a Georgia Tech Venture Lab company has an exclusive license to commercialize the instrumented vehicle tracking, mapping, analytical, and data management methods developed by a team of researchers at the Georgia Institute of Technology. To date, these researchers have monitored and analyzed the data from more than 1.7 million vehicle trips collected on a second-by-second basis. Their communications and computing systems automate the processing and analysis of detailed vehicle data to support efforts in driver safety, risk assessment/insurance, fleet logistics, traffic operations, and transportation planning. L&M II’s President and Chief Executive Officer, John J. Mackey, said, “Logistics & Management II Corporation is excited about our progress and success with the significant upswing trend of our field proven MACBOX products in the insurance and auto industry.” Contact: John Mackey516-236-4790 Jjohnmackey@aim.com M3Consulting - Brake Insite Brake Insite by M3consulting Brake Insite is a comprehensive air brake evaluation system designed by M3's engineers. They saw the need for an accurate, verifiable way to determine the condition of a vehicle's air brake system following a collision.
To find out more contact Alan Moore at 321-946-1283
or alan@brakeinsite.com TCRP Report 66: Effective Practices to Reduce Bus Accidents Problem Statement and Research Objective Accident prevention is a priority of every bus operation. Generally, practices that are used to prevent accidents and promote safe driving fall into one of three categories. Human resources—including training, incentives to reward good performance, progressive discipline for adverse performance, operator selection, operator work rules and procedures, labor, safety awareness, and intervention for employees at risk. Management—including accident data tracking and analysis, accident investigation, public and passenger education, hazard identification and resolution, safety inspections, safety committees, and supervision. Operations—including bus stop location and design; snow and ice removal; traffic and parking enforcement; route selection and scheduling; use of undercover checkers on buses; and technology applications, such as cameras on buses, “black box” recorders, daytime running lights, and dual mirrors. Specific practices that are used to prevent accidents and promote safe driving vary widely among transit systems, although most systems use all three types noted previously to some extent. There is no comprehensive inventory of such practices for operators to readily reference, nor have best practices been evaluated in a systematic manner. The overall objective of the research was to develop a directory of effective practices used to prevent bus accidents. These practices were based on a thorough inventory and assessment of the safety practices used by small, medium, and large transit systems. Particular emphasis was placed on practices whose reduced accident rate was found to be directly attributable to a specific practice. The products of this project are expected to be of principal value to transit managers, transit operators, transit safety personnel, and risk management staff of large, medium, and small transit agencies. Comparison of Delta-V And Occupant Impact Velocity Crash Severity Metrics Using Event Data Recorders Abstract This research compares the ability of delta-V and the occupant impact velocity (OIV), a competing measure of crash severity, to predict occupant injury in real world collisions. A majority of the analysis is performed using 191 cases with vehicle kinematics data from Event Data Recorders (EDRs) matched with detailed occupant injury information. Cumulative probability of injury risk curves are generated using binary logistic regression for all data, a belted subset, and an unbelted subset. By comparing the available fit statistics and performing a separate ROC curve analysis, the more computationally intensive OIV is found to offer no significant predictive advantage over delta-V. Delta-V has traditionally been used as a measure of crash severity and predictor for occupant injury for vehicular crashes. The occupant impact velocity (OIV), as defined by the flail space model (Michie, 1981), is a competing severity metric used by the roadside safety community to evaluate occupant risk. Unlike delta-V, the OIV requires a full crash pulse to calculate a theoretical impact velocity of the occupant with the vehicle interior. Although this provides a more physically representative model of occupant kinematics, there has been no study to date evaluating whether the flail space model provides additional benefit in terms of injury prediction in real world collisions. SRR Training ACTAR Prep Course, Crash Investigation, Crash Reconstruction, Cad Zone, Commercial Vehicles, Crush, Human Factors, Motorcycle, Bicycle, Pedestrians, Report Writing Chief Reggie Redfern (President/CEO -SRR Training) was a police officer for the City of East Hampton, MA for over 27 years and that department’s Chief of Police for 16 years. He retired June 30, 2002, and has since brought superior law enforcement training to professionals throughout the Nation through his company, SRR Traffic Safety Consulting. Law enforcement must be prepared to face numerous, ever-changing challenges. The training received should be ready to face these same challenges as well. While the foundation of our courses is based on proven methodologies, SRR Training is constantly modifying them to reflect the latest trends in crash and criminal investigatory procedures. If you are looking to provide your officers with a unique learning experience, or if you yourself wish to enhance your own professionalism, our courses and instructors will help you to meet your goal. At SRR, we focus on bringing high quality, in demand courses to law enforcement officers throughout the Nation. Our instructors are recognized experts both on the job and in the classroom. Their main goal? The sharing of information and experience with those individuals that want to learn. In today’s world, the most powerful tool a law enforcement officer can possess is knowledge. We pride ourselves in providing that edge. Analysis of Pregnant Occupant Crash Exposure and the Potential Effectiveness of Four-Point Seatbelts in Far Side Crashes Abstract The purpose of this paper is to present the crash exposure patterns of pregnant occupants and to evaluate the effectiveness of restraint systems, including four-point seat-belts, in far-side crashes. The NASS CDS database revealed that 53.0% of pregnant occupants are exposed to frontal crashes while 13.5% are exposed to far side impacts. Given that far side crashes were the second leading crash mode after frontal impacts, a previously validated MADYMO computer model of a 30 week pregnant occupant was utilized to investigate pregnant biomechanics in far side crashes. Three impact speeds (5, 15 and 25 mph) were simulated with four restraint conditions: unbelted, lap-belt only, three-point belt and a four-point belt. Direct abdominal contact from the shoulder strap of the three-point or four-point caused uterine-placental strain in contrast to the inertial loading induced strain in the lap belt and unbelted cases. Overall, the three-point and four-point belt systems provide superior restraint effectiveness for the pregnant occupant compared to the lap-belt and no restraint cases. The four-point resulted in slightly better performance than the three-point belt by reducing the fetal injury risk and occupant excursion. Advertising in the ARC Network
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