After that video came out, a bunch of trailer manufactuers improved their underride guard designs, and the newer ones are apparently much better at stopping car

After that video came out, a bunch of trailer manufactuers improved their underride guard designs, and the newer ones are apparently much better at stopping cars: https://www.iihs.org/iihs/news/desktopnews/all-major-trailer-makers-earn-iihs-award-for-good-underride-protection https://www.iihs.org/iihs/news/desktopnews/all-major-trailer... It's going to be a long time before most trailers have the improved guards, but hopefully it will get better eventually.