The only way to protect yourself from this is to be somewhere else when it happens. I leave room to go off the road right or left and I watch the rview until I get some sacrificial mass stopped behind me, just like Frank said. The only way to survive out there is to drive like I learned to on a bike - every sob out there is out to kill you, actively hunting you to pull out in front of/run into/slide into/get knocked into you, 'cause they're the guy in the black suit with the grimy bandaid on his cheekbone...

I like these trucks because they are tough as nails and light enough and just quick enough to get out of the way when they have to. If you loaded it down with another 600lbs of roll cage stout enough to protect you more than GW's gen1 did, (a) you might die from the impact accleration without the crumple zone, or (b) you might not get out of the way or roll over in the evade maneuver because of all that mass up high. 35mph is enough to kill you - it's not the speed, it's the sudden stop at the end.