Don't be silly. The red barriers would have to accelerate the cars to move at more at 112 meters per frame (in fact much more with air drag), and everyone knows LFS resets cars that move more than 2 meters in a single frame.
Using the cockpit view, it does feel bloody fast sometimes, and makes me dizzy as well, and when i land i have no idea where i am, what way i am facing, or if i should even be alive after such an ordeal!.
what i dont understand, but has probably been explained, is why arent the red and white barriers just made the same as the fences at the side of the track, which dont fire you into orbit?
afaik the prob is that, on the "mobile" barriers, four impact zones very close to each other. So it can happen that, when you crash in it, your car passes two or more of these zones before the physic engine circulation realizes and then tries to calculate, based on you position inside the barrier, with which force it has to push you back, and based on the multiple zones it goes berserk sometimes.
"So, you are in the middle of that barrier, passed three zones already, makes a entry speed of.....1000km/h......BAM"