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Technical Paper

Accident Statistical Distributions from NASS CDS - An Update

2020-04-14
2020-01-0518
The National Automotive Sampling System (NASS) Crashworthiness Data System (CDS) contains an abundance of field crash data. As technology advances and the database continues to grow over the years, the statistical significance of the data increases and trends can be observed. The purpose of this paper is to provide a broad-based, up-to-date, reference resource with respect to commonly sought-after crash statistics. Charts include up-to-date crash distributions by Delta-V and impact direction with corresponding injury severity rates. Rollover data is also analyzed, as well as historical trends for injury severity, belt usage, air bag availability, and the availability of vehicle safety technology.
Technical Paper

The Effect of FMVSS 301R on Vehicle Structure in Rear Impact

2020-04-14
2020-01-1226
Vehicle structures are designed to manage impact forces and transfer crash energy, in addition to their primary purpose of connecting all the vehicle powertrain, suspension, steering, HVAC, electronics, occupant accommodation, and weatherproofing. With the introduction of new rear impact requirements, the design of rear structures has evolved and the use of high strength steel has increased. This study objective was to assess the effect of new FMVSS 301 requirements on vehicle responses. NHTSA conducted 33 offset rear crash tests at 80 km/h with vehicles that pre-dated the newer FMVSS 301R requirements and 88 with vehicles that complied with the newer requirements, with a 2009-2015 model year range. The vehicles were grouped by size and the permanent crush was tabulated. Overall, the struck-side maximum crush decreased in the newer model vehicles. Seven matches with pre and post 301R were identified on the same make and model vehicle of different generations.
Technical Paper

Review and Comparison of Published Rollover Test Results

2010-04-12
2010-01-0057
Rollover research data is a valuable resource in the field of accident reconstruction and automotive safety. This data can provide the accident reconstructionist with information regarding number of rolls versus roll distance and vehicle average deceleration during the rollover event. One source of rollover research data readily available to the general public is the National Highway Traffic Safety Administration's (NHTSA) Crash Test Database which includes dolly rollover test data. This data includes testing performed using the FMVSS 208 dolly fixture and the NHTSA Rollover Test Device (RTD) used from 1985 to 1995. The purpose of this paper is to provide a more thorough analysis of the RTD rollover tests performed for NHTSA which includes a history of the RTD test series, detailed review and analysis of the available data and videos to provide a better understanding of the actual vehicle test dynamics.
Technical Paper

Accident Statistical Distributions from NASS CDS

2010-04-12
2010-01-0139
The National Automotive Sampling System (NASS) Crashworthiness Data System (CDS) contains a wealth of field accident data. As the size of the database continues to grow, the statistical significance of the data increases and trends can be observed. Numerous papers contain analysis and graphs of particular aspects of the data, but they are usually included in a supporting role to the main topic of the paper, and are extremely difficult to locate in a focused document search. The purpose of this paper is to provide an updated, comprehensive resource to reference when looking for commonly sought-after accident statistics. Charts include accident distributions by Delta-V and impact direction with corresponding injury severity rates. Rollover data is also analyzed, as well as historical trends for injury severity, belt usage, and air bag availability.
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