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Compartmentalization and Concussion Assessment in a


WRITTEN BY KRISTIN POLAND, PH.D.


S


chool buses have the safest record of any vehicle used to transport students to and from school and school-related activities, even without lap/ shoulder belts. However, we at the National


Transportation Safety Board (NTSB) have found that in certain types of crashes, these occupant restraint systems would provide students with an enhanced level of protection that compartmental- ization alone cannot. Te NTSB has investigated a wide variety of school bus crashes. Typically, the investigations focused on crashes involving a severe impact, where the school bus was


28 School Transportation News • MAY 2018


struck on the side by another large vehicle, or cases in which the school bus experienced a high-speed rollover. Te NTSB has shown that in these crashes, like Chesterfield, New Jersey and Port Saint Lucie, Florida several years ago, the crash forces can render compartmentalization incomplete. Children were thrown out of the seating compartment during the crash sequence and, as a result, were vulnerable to injury when impacting non-energy absorbing structures. So, why did the NTSB investigate the February 2014 crash between a large school bus and an SUV in Centerville, Louisiana? Te NTSB was originally interested


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