The Static Stability Factor (SSF) and the NCAP dynamic rollover test provide NHTSA the information to assess rollover resistance of new vehicles. From model year (MY) 2004-2013, the weighted average of SSF in SUVs improved from 1.17 to 1.21 while the weighted average of SSF in pickup trucks worsened from 1.21 to 1.18. Other types of passenger vehicles did not have significant trends in the weighted average of SSF during those MYs. Some light trucks and vans (LTVs) failed the dynamic rollover test, but none of the passenger vehicles failed the test since MY 2008. (Author/publisher)
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