After stopping on the
high-speed highway, presume (and don't look back)
that you're going to be hit from behind. Preposition
your body so that your head and neck are flat against
the headrest, and if you don't have one, slide down in the seat
so your head won't whiplash over the back of the seat resulting
in neck injury, paralysis or death, which is easily
preventable in most rear end collisions.