One thing that dash cam videos have taught me is to get past a truck as fast as you can, and if you can't then get back behind it. Never stay next to a truck and match its speed.I had a semi rear end my prius. Lifted my car up and moved it. But his squishy plastic bumper and my plastic bumper just absorbed the impact. It was wild. When I got out to look, saw a little paint trade but bumper still sturdy, looked up at the trucker and gave a thumbs up. He gave me a signal of wiping sweat off his brow, like "Phew! Close call" and we both kept on driving. I like to think he still tells the tale of the new prius driver he rear-ended who did not ask for insurance information.