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Special Crash Investigations: Counts of Frontal Air Bag Related Fatalities and Seriously Injured Persons. Report Date: January 1, 2008.
| 题名： | Special Crash Investigations: Counts of Frontal Air Bag Related Fatalities and Seriously Injured Persons. Report Date: January 1, 2008. |
| 关键词： | *Air-bags; *Fatalities-; *Motor-vehicle-crashes; *Injuries-.;Drivers-; Investigations-; Passengers-; Children-; Graphs-Charts; Tables-Data. |
| 摘要： | The methods for estimating the number of Registered Air Bag Equipped Vehicles, and the Fatalities Per Million Vehicle Years have been modified to more accurately reflect the air bag exposure rates for drivers and passengers. In Tables 2-4, a new estimate for Registered Air Bag Equipped Vehicles was compiled by using R.L. Polk vehicle registration data. The new figures have been modified to consider the attrition rates of vehicles on the road by model year, and the amount of time each vehicle was on the road during its first year. The current years estimate for the modified Registered Air Bag Equipped Vehicles is the same as the previous years Registered Air Bag Equipped Vehicles. These numbers will be updated when R.L. Polk current year vehicle registration data become available the following year. The quantity Fatalities Per Million Vehicle Years for a specific vehicle model year was previously calculated by dividing the count of occupants fatally injured by a deploying air bag for a given vehicle model year, by the product of the number of new vehicles registered that are air bag equipped for the given year and the number of years the vehicles of that year have been on the road. In the past when calculating the number of years vehicles of a given model year have been on the road, with the exception of the current MY, each vehicle was counted as being on the road for a full year. A new method of estimating the time each vehicle was on the road during its first year has been developed in which an even distribution of vehicle registrations is assumed throughout the year. Analysis of this distribution shows that a more accurate estimate of the time each vehicle was on the road in its first production year is one half of a year. The quantity Fatalities Per Million Vehicle Years for a normalized 12-month period was previously calculated by dividing the count of occupants fatally injured by a deploying air bag for each 12-month production period by the total number of registered vehicles with air bags during that same interval. Each 12-month production period was aligned with the vehicle production year, September 1 through August 31. A change similar to the one made for the vehicle model year exposure estimate was made for the quantity Fatalities Per Million Vehicle Years for a normalized 12-month period. The new method divides the count of occupants fatally injured by a deploying air bag for each 12-month period by the sum of the total number of registered vehicles with air bags of the previous model years and one half the registered vehicles of the vehicle model year that corresponds to the production period of the crash. |
| 报告类型： | 科技报告 |
相关文献
- Counts of Frontal Air Bag Related Fatalities and Seriously Injured Persons. Special Crash Investigations.
- Counts of Frontal Air Bag Related Fatalities and Seriously Injured Persons; Special Crash Investigations. Report Date: January 1, 2008.
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- Special Crash Investigations: Counts of Frontal Air Bag Related Fatalities and Seriously Injured Persons. Report Date: January 1, 2005.
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