https://trid.trb.org/ en-us Copyright © 2026. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) https://trid.trb.org/Images/PageHeader-wTitle.jpg https://trid.trb.org/ https://trid.trb.org/View/2608393 Tue, 14 Oct 2025 10:33:07 GMT https://trid.trb.org/View/2608393 https://trid.trb.org/View/2367480 Tue, 16 Apr 2024 09:52:53 GMT https://trid.trb.org/View/2367480 https://trid.trb.org/View/2219000 Mon, 24 Jul 2023 16:54:46 GMT https://trid.trb.org/View/2219000 https://trid.trb.org/View/1940037 Mon, 13 Jun 2022 13:14:36 GMT https://trid.trb.org/View/1940037 https://trid.trb.org/View/1903720 Wed, 26 Jan 2022 14:14:47 GMT https://trid.trb.org/View/1903720 https://trid.trb.org/View/1832653 Thu, 09 Dec 2021 10:38:01 GMT https://trid.trb.org/View/1832653 https://trid.trb.org/View/1831687 Thu, 09 Dec 2021 10:37:43 GMT https://trid.trb.org/View/1831687 https://trid.trb.org/View/1829973 10,000 lbs.). Risk of rollover and ejection was determined as well as belt usage rates. Risk of ejection was also analyzed based on rollover status and belt use. The Abbreviated Injury Scale (AIS) was used as an injury rating system for the involved vehicle occupants. These data were further analyzed to determine injury distribution based on factors such as crash type, ejection, and restraint system use. The maximum AIS score (MAIS) was analyzed and each body region (head, face, spine, thorax, abdomen, upper extremity, and lower extremity) was considered for an AIS score of three or greater (AIS 3+). The majority of heavy truck occupants in this study were belted (71%), only 2.5% of occupants were completely or partially ejected, and 28% experienced a rollover event. In the analyzed data set, none of the belted occupants experienced a complete ejection while 4.4% of unbelted occupants did experience a complete ejection. There was a higher, but not statistically significant, risk of complete and of partial ejection for occupants of heavy trucks that experienced a rollover than for occupants of heavy trucks that did not experience a rollover. An MAIS score of one or two (minor or moderate injury, respectively) accounted for 85% of the injuries to the heavy truck occupants. The MAIS score shifted towards greater injury severity in the cases of rollover, ejection, and unbelted occupants. The head, thorax, and lower extremities contained the highest percentages of AIS 3+ injuries. The head was the most commonly injured body region of ejected occupants, while injuries of belted occupants were most commonly found to the thorax.]]> Thu, 09 Dec 2021 10:37:29 GMT https://trid.trb.org/View/1829973 https://trid.trb.org/View/1829745 Thu, 09 Dec 2021 10:37:27 GMT https://trid.trb.org/View/1829745 https://trid.trb.org/View/1802846 Thu, 09 Dec 2021 10:25:57 GMT https://trid.trb.org/View/1802846 https://trid.trb.org/View/1778918 Thu, 09 Dec 2021 10:12:08 GMT https://trid.trb.org/View/1778918 https://trid.trb.org/View/1776850 Thu, 09 Dec 2021 10:12:02 GMT https://trid.trb.org/View/1776850 https://trid.trb.org/View/1776841 Thu, 09 Dec 2021 10:12:02 GMT https://trid.trb.org/View/1776841 https://trid.trb.org/View/1888988 Tue, 23 Nov 2021 11:49:33 GMT https://trid.trb.org/View/1888988 https://trid.trb.org/View/1862922 Sun, 15 Aug 2021 18:07:22 GMT https://trid.trb.org/View/1862922