MAIS (05/08) Injury Probability Front/Rear 2022 NHTSA

Topics and News related to Vehicle Safety Issues such as New Technologies and Recalls
MSI
Site Admin
Posts: 2296
Joined: Thu Jun 18, 2009 12:37 pm

MAIS (05/08) Injury Probability Front/Rear 2022 NHTSA

Post by MSI »

From NAPARS facebook page
  • Last year, NHTSA published a paper on Injury Potential as a function of speed change in frontal and rear end impacts. No mention of side crashes, but there you go. The Maximum Abbreviated Injury Scale (MAIS) is one way to classify how badly people are hurt. 0=no injury, MAIS6=FATAL. In rear enders, people may get minor injuries (MAIS1) at any speed, but peaking about DV=30mph. Seems high to me, but that's what they reported. There was essentially zero MAIS4 injuries listed, and MAIS2 seems kinda light. Those issues look like cataloging artifacts to me. Regardless, the fatal line seems right. By DV=+55 mph, most occupants are killed. I've put the report in the Reference Library, titled "2022 NHTSA injury probability frontal and rear impacts 813219.pdf", so you can read the whole thing
Here's a link to the report Abstract
  • This analysis established the univariant occupant injury risk predictive models (or injury probability curves) through logistic regression using delta V as the predictor. Delta V is a measure of crash severity. Occupant injury severity was based on the Maximum Abbreviated Injury Scale (MAIS), 2005 revision, 2008 update, which is noted as MAIS(05/08) in this report. The analysis used crash data from the 2010–2015 National Automotive Sampling System Crashworthiness Data System. The injury probability curves were developed for three crash modes: “all crashes,” “frontal crashes,” and “rear-end crashes.”
    There are some notable limitations with the occupant sample that would affect the use of the established probability curves. One is that CDS collects relatively more severe crashes. The second one is that the 2010–2015 CDS recorded AIS injury information only for occupants in vehicles 10 years old and newer. This resulted in occupants in older vehicles with missing MAIS value. The third one is that there are a sizeable number of cases
    with missing delta V’s. Thus, the established injury probability curves might not properly reflect the injury probabilities for occupants from older vehicles nor for occupants in a crash sample that is very different from that in the CDS.
MAIS Frontal.png
MAIS Frontal.png (142.36 KiB) Viewed 5849 times
MAIS Rear.png
MAIS Rear.png (146.84 KiB) Viewed 5849 times