why old people turn their cars so slowly

I think I am finding out why old people turn their cars so slowly.  If they're anything like me, and they are tearing at the seams, a hard or even moderately fast turn--especially over a jouncing entry point not on the level with the street--changes the vectors or shifts the inertia or some other science-y force-related thing, and it puts pressure on joints that can no longer bear pressure without complaint.  So if you are ever feeling irritated at elderly people taking their sweet time making that turn off the street at 2 miles per hour, have some sympathy for the irritation their joints feel even at that slow crawl.