Here is a Youtube video, posted by Cars-Trucks TV, which demonstrates the effectiveness of the improved rear underride guards designed by five of the major trailer manufacturers — Great Dane, Manac, Stoughton, Vanguard, and Wabash — from 2013 to 2017. They received a Toughguard award from IIHS.
They have proven that creative minds can come up with better underride protection. The cars are damaged from the crash, but underride is prevented and lives are preserved.
