Current research into underride guard performance is focused on providing greater understanding of  the characteristics of underride events and contributing factors, as well as providing next steps towards defining a computer model to evaluate underride guard designs and vehicle impacts.

• Heavy-Vehicle Crash Data Collection and Analysis to Characterize Rear and Side Underride and Front Override in Fatal Truck Crashes, DOT HS 811 725, March 2013
  
• Analysis of Rear Underride in Fatal Truck Crashes, DOT HS 811 652 August 2012