Here is some basic information on understanding underride from the Insurance Institute for Highway Safety (IIHS):
A panel of experts discuss underride at a Briefing on The Hill, October 12, 2017, to bring greater understanding of the problem and solutions of deadly but preventable truck underride. Matt Brumbelow, a research engineer at the Insurance Institute for Highway Safety (IIHS), discusses the problem of truck underride and the research which IIHS has done to study rear and side underride protection.
The Insurance Institute for Highway Safety once again did a fantastic job of hosting the Underride Roundtable. They have now provided us with links to the Second Underride Roundtable held at the IIHS Vehicle Research Center in Ruckersville, Virginia, on August 29, 2017. Here is the agenda, followed by the videos: