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The Effects of Active and Conventional Head Restraints on Front Seat Occupant Responses in Rear Impacts
Technical Paper
2020-01-1217
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This study assesses front seat occupant responses in rear impacts with active head restraints (AHR) and conventional head restraints (CHR) using field accident data and test data from the Insurance Institute for Highway Safety (IIHS). 2003-2015 NASS-CDS data were analyzed to determine injury rates in 1997+ model year seats equipped with AHR and CHR. Results indicated that less than 4% of occupants were in seats equipped with AHR. Crashes of delta-V <24 km/h accounted for more than 70% of all exposed front seat occupants, irrespective of head restraint design. Rear crashes with a delta-V < 24 km/h included 35.6% fewer occupants who sustained a MAIS 1-2 injury overall and 26.4% fewer who sustained a MAIS 1-2 cervical injury in vehicles equipped with AHR compared to CHR. In IIHS 16 km/h rear sled tests, the biomechanical response of an instrumented BioRID was evaluated on seats with AHR and CHR. HIC15 and concussion risk were calculated from head acceleration data. Test data with AHR and CHR were matched by make and model. First, older model seats with CHR were compared to models with AHR. Then, the models with AHR were compared to newer models with CHR. These analyses generally showed a reduction in head and upper neck responses with AHR compared to prior generation CHR. Further reduction in these responses was observed in newer CHR compared to prior model AHR, in general. Time at initiation of head contact was 89.1 ±13.7 ms (mean ± standard deviation) with older CHR, 62.4 ± 8.7 ms with AHR, and 60.6 ± 9.0 ms with newer CHR. However, contact duration was longest in the AHR tests. The average seatback deflection was 13.6 ± 3.6 degrees with older CHR, 12.3 ± 3.0 degrees with AHR, and 10.4 ± 3.0 degrees with newer CHR. Similar trends of decreasing concussion risk with between AHR and older CHR were observed, and concussion risk was comparable between AHR and newer CHR. However, the risk of concussion was negligible across all tests. The results from this study underline continuous improvement in injury mitigation, regardless of head restraint design.
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Parenteau, C., Campbell, I., and Pasquesi, S., "The Effects of Active and Conventional Head Restraints on Front Seat Occupant Responses in Rear Impacts," SAE Technical Paper 2020-01-1217, 2020, https://doi.org/10.4271/2020-01-1217.Data Sets - Support Documents
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References
- Wiklund , K. and Larsson , H. Saab Active Head Restraint (SAHR) - Seat Design to Reduce the Risk of Neck Injuries in Rear Impacts SAE Technical Paper 980297 1998 https://doi.org/10.4271/980297
- Carlsson , A. , Pipkorn , L. , Kullgren , A. , and Svensson , M. Real-World Adjustments of Driver Seat and Head Restraint in Saab 9-3 Vehicles Traffic Injury Prevention 18 4 398 405 2017
- O'Neill , B. , Haddon , W. , Kelley , A.B. , and Sorenson , W.W. Automobile Head-Restraints-Frequency of Neck Injury Claims In Relation to the Presence of Head-Restraints American Journal of Public Health 62 399 406 1972
- States , J.D. , Balcerak , J.C. , and Williams , J.S. Injury Frequency and Head-Restraint Effectiveness in Rear End Impact Accidents 16th Stapp Car Crash Conference 1972 228 257
- Kahane , C.J. 1982
- Bigi , D. , Heilig , A. , Steffan , H. , and Eichberger , A. A Comparison Study of Active Head Restraints for Neck Protection in Rear-End Collisions Proceedings of the 16th International Technical Conference on the Enhanced Safety of Vehicles 1998
- Viano , D.C. Role of the Seat in Rear Crash Safety Warrendale, PA Society of Automotive Engineers 2002 1 491 0-7680-0847-6
- Viano , D.C. and Olsen , S. The Effectiveness of Active Heads Restraint in Preventing Whiplash Journal of Trauma 51 5 959 969 2001
- Kullgren , A. , Stigson , H. , and Krafft , M. Development of Whiplash Associated Disorders for Male and Female Car Occupants in Cars Launched Since the 80s in Different Impact Directions IRCOBI Conference September 11-13, 2013 Göteborg, Sweden
- Peterson , A.B. , Xu , L. , Daugherty , J. , Breiding , M.J. 2019
- Courtney , A.C. , Campbell , I.C. , Courtney , E. , and Pasquesi , S.A. Risk of Concussion due to Head Acceleration in Rear Impact Sled Tests of Passenger Automobile Seats In 62nd Annual Proceedings of the Association for the Advancement of Automotive Medicine Oct. 7-10, 2018
- Pasquesi , S.A. , Bruno , A. , Courtney , A. , Imler , S.M. et al. Risk of Concussion in Low- to Moderate-Speed Frontal and Rear-End Motor Vehicle Collisions Evaluated Using Head Acceleration-Based Metrics SAE Technical Paper 2019-01-1218 2019
- Scanlon , J. , Isaacs , J. , and Garman , C. Head and Neck Loading Conditions over a Decade of IIHS Rear Impact Seat Testing SAE Technical Paper 2019-01-1227 2019 https://doi.org/10.4271/2019-01-1227
- Funk , J.R. , Duma , S.M. , Manoogian , S.J. , and Rowson , S. Biomechanical Risk Estimates for Mild Traumatic Brain Injury 51st Annual Proceedings of the Association for the Advancement of Automotive Medicine Oct. 15-17, 2007
- Rowson , S. and Duma , S.M. Development of the STAR Evaluation System for Football Helmets: Integrating Player Head Impact Exposure and Risk of Concussion Annals of Biomedical Engineering 39 8 2130 2140 2011
- Funk , J.R. , Rowson , S. , Daniel , R.W. , and Duma , S.M. Validation of Concussion Risk Curves for Collegiate Football Players Derived from HITS Data Annals of Biomedical Engineering 40 1 79 89 2012
- Rowson , S. , Duma , S.M. , Beckwith , J.G. , Chu , J.J. et al. Rotational Head Kinematics in Football Impacts: An Injury Risk Function for Concussion Annals of Biomedical Engineering 40 1 1 13 2012
- Rowson , S. and Duma , S.M. Brain Injury Prediction: Assessing the Combined Probability Using Linear and Rotational Head Acceleration Annals of Biomedical Engineering 41 5 873 882 2013 10.1007/s10439-012-0731-0
- Welch , T.D.J. , Bridges , A.W. , Gates , D.H. , Heller , M.F. et al. An Evaluation of BioRID II and Hybrid III During Low-and Moderate-Speed Rear Impact SAE Technical Paper 2010-01-1031 2010 https://doi.org/10.4271/2010-01-1031
- Rowson , S. and Duma , S.M. The Virginia Tech Response Annals of Biomedical Engineering 40 12 2512 2518 2012 10.1007/s10439-012-0659-4
- Mertz , H.J. , Irwin , A.L. , and Prasad , P. Biomechanical and Scaling Basis for Frontal and Side Impact Injury Assessment Reference Values Stapp Car Crash Journal 60 625 657 2016
- Viano , D.C. and Parenteau , C.S. Update on the Effectiveness of High Retention Seats in Preventing Fatal Injury in Rear Impacts Traffic Injury Prevention 16 2 154 158 2015 10.1080/15389588.2014.925109a
- Viano , D.C. and Parenteau , C.S. NASS-CDS Analysis of High Retention Seat Performance in Rear Impacts Traffic Injury Prevention 16 5 491 497 2015 10.1080/15389588.2014.957280b
- Hynd , D. and van Ratingen , M. Challenges in the Development of a Regulatory Test Procedure for Neck Protection in Rear Impacts: Status of the EEVC WG20 and WG12 Joint Activity Proceedings of the 19th International Technical Conference on the Enhanced Safety of Vehicles 2005
- Hell , W. , Schick , S. , Langwieder , K. , and Zellmer , H. Biomechanics of Cervical Spine Injuries in Rear End Car Impacts: Influence of Car Seats and Possible Evaluation Criteria Traffic Injury Prevention 3 2 127 140 2002 10.1080/15389580212000
- Viano , D.C. and White , S. Seat Strength in Rear Body Block Tests Traffic Injury Prevention 17 5 502 507 2016
- Szabo , T.J. , Welcher , J.B. , Anderson , R.D. , Rice , M.M. et al. Human Occupant Kinematic Response to Low Speed Rear-End Impacts SAE Technical Paper 940532 1994 https://doi.org/10.4271/940532
- Siegmund , G. , King , D.J. , Lawrence , J.M. , Wheeler , J.B. et al. Head/Neck Kinematic Response of Human Subjects in Low-Speed, Rear-End Collisions SAE Technical Paper 973341 1997 https://doi.org/10.4271/973341
- Viano , D.C. Effectiveness of High-Retention Seats in Preventing Fatality: Initial Results and Trends SAE Technical Paper 2003-01-1351 2003 https://doi.org/10.4271/2003-01-1351
- Viano , D.C. Seat Design Principles to Reduce Neck Injuries in Rear Impacts Traffic Injury Prevention 9 6 552 560 2008
- Padmanaban , J. , Burnett , R. , and Levitt , A. Seatback Strength as a Predictor of Serious Injury Risk to Belted Drivers and Rear Seat Occupants in Rear-Impact Crashes SAE Technical Paper 2016-01-1512 2016 https://doi.org/10.4271/2016-01-1512
- Exponent March 22-23, 1994
- Kim , A. , Anderson , K.F. , Berliner , J. , Bryzik , C. et al. A Comparison of the Hybrid III and BioRID II Dummies in Low-Severity, Rear-Impact Sled Tests SAE Technical Paper 2001-22-0012 2001 https://doi.org/10.4271/2001-22-0012
- Kim , A. , Sutterfield , A. , Rao , A. , Anderson , K.F. , Berliner , J. , Hassan , J. , Irwin , A. , Jensen , J. , Kleinert , J. , Mertz , H.J. , Pietsch , H. , Rouhana , S. , and Scherer , R. A Comparison of the BioRID II, Hybrid III, and RID2 in Low Severity Rear Impacts Proceedings of the 19th International Technical Conference on the Enhanced Safety of Vehicles 2005
- Arndt , S.R. , Cargill , R.S. , and Hammoud , S. Head Accelerations Experienced During Everyday Activities and While Riding Roller Coasters Proceedings of the Human Factors and Ergonomics Society 48th Annual Meeting 1973-1977 2004
- Bayly , P. , Naunheim , R. , Standeven , J. , Neubauer , J. , Lewis , L. , and Genin , G.M. Linear and Angular Accelerations of the Human Head during Heading of a Soccer Ball Proceedings of the Second Joint EMBS/BMES Conference Houston, TX 2002
- Funk , J.R. , Cormier , J.M. , Bain , C.E. , Guzman , H. , and Bonugli , E. An Evaluation of Various Neck Injury Criteria in Vigorous Activities Proceedings of the International Research Conference on the Biomechanics of Impact (IRCOBI) 2007 233 248
- Funk , J.R. , Cormier , J.M. , Bain , C.E. , Guzman , H. et al. Head and Neck Loading in Everyday and Vigorous Activities Annals of Biomedical Engineering 39 2 766 776 2011 10.1007/s10439-010-0183-3
- Kloppenborg , N. , Amenson , T. , Wernik , J. , and Wiechel , J. Vehicle and Occupant Response in Low-Speed Go-Kart Crash Tests Proceedings of the ASME 2015 International Mechanical Engineering Congress and Exposition 2015 10.1115/IMECE2015-53585
- Naunheim , R.S. , Standeven , J. , Richter , C. , and Lewis , L.L. Comparison of Impact Data in Hockey, Football, and Soccer Journal of Trauma 48 5 938 941 2000 10.1097/00005373-200005000-00020
- Tierney , R.T. , Higgins , M. , Caswell , S.V. , Brady , J. et al. Sex Differences in Head Acceleration during Heading while Wearing Soccer Headgear Journal of Athletic Training 43 6 578 584 2008 10.4085/1062-6050-43.6.578
- Chapline , J.F. , Ferguson , S.A. , Lillis , R.P. , Lund , A.K. , and Williams , A.F. Neck Pain and Head Restraint Position Relative to the Driver’s Head in Rear-End Collisions Accident Analysis and Prevention 32 287 297 2000
- Viano , D.C. Seat Influences on Female Neck Responses in Rear Crashes: A Reason Why Women Have Higher Whiplash Rates Traffic Injury Prevention 4 228 239 2003
- Gennarelli , T.A. , Thibault , L.E. , Adams , J.H. , Graham , D.I. et al. Diffuse Axonal Injury and Traumatic Coma in the Primate Annals of Neurology: Official Journal of the American Neurological Association and the Child Neurology Society 12 6 564 574 1982
- Gennarelli , T.A. , Thibault , L.E. , Tomei , G. , Wiser , R. et al. Directional Dependence of Axonal Brain Injury due to Centroidal and Non-Centroidal Acceleration SAE Technical Paper 872197 1987 https://doi.org/10.4271/872197
- Smith , D.H. , Nonaka , M. , Miller , R. , Leoni , M. et al. Immediate Coma Following Inertial Brain Injury Dependent on Axonal Damage in the Brainstem Journal of Neurosurgery 93 2 315 322 2000
- Broglio , S.P. , Schnebel , B. , Sosnoff , J.J. , Shin , S. et al. The Biomechanical Properties of Concussions in High School Football Medicine and Science in Sports and Exercise 42 11 2010 2064
- Browne , K.D. , Chen , X.H. , Meaney , D.F. , and Smith , D.H. Mild Traumatic Brain Injury and Diffuse Axonal Injury in Swine Journal of Neurotrauma 28 9 1747 1755 2010
- Eucker , S.A. , Smith , C. , Ralston , J. , Friess , S.H. , and Margulies , S.S. Physiological and Histopathological Responses Following Closed Rotational Head Injury Depend on Direction of Head Motion Experimental Neurology 227 1 79 88 2011
- Sullivan , S. , Friess , S.H. , Ralston , J. , Smith , C. et al. Behavioral Deficits and Axonal Injury Persistence after Rotational Head Injury are Direction Dependent Journal of Neurotrauma 30 7 538 545 2013
- Stephens , J.R. , Holmes , S. , Bulters , D. , and Evans , B.T. The Effect of Direction of Force to the Craniofacial Skeleton on the Severity of Brain Injury in Patients with a Fronto-Basal Fracture International Journal of Oral and Maxillofacial Surgery 45 7 872 877 2016
- Atlan , L.S. , Smith , C. , and Margulies , S.S. Improved Prediction of Direction-Dependent, Acute Axonal Injury in Piglets Journal of Neuroscience Research 96 4 536 544 2018
- Takhounts , E.G. , Craig , M.J. , Moorhouse , K. , McFadden , J. , Hasija , V. Development of Brain Injury Criteria (BrIC) SAE Technical Paper 2013-22-0010 2013 https://doi.org/10.4271/2013-22-0010
- Laituri , T.R. , Henry , S. , Pline , K. , Li , G. et al. New Risk Curves for NHTSA’s Brain Injury Criterion (BrIC): Derivations and Assessments SAE Technical Paper 2016-22-0012 2016 https://doi.org/10.4271/2016-22-0012
- Takhounts , E.G. , Hasija , V. , and Craig , M.J. BrIC and Field Brain Injury Risk Proceedings of the 26th International Technical Conference on the Enhanced Safety of Vehicles 2019