I lost a couple friends to pot induced accidents, both falls. One died, and one suffered brain injuries such that he could not remember anything before the fall. I suspect pot was probably the main contributing factor in a couple other driving deaths of my friends.
But I'm still a proponent of legalization. People, including kids, have no problem getting it today. They might as well get it from a tax paying American farmer instead of funding Mexican cartels.
No problem for some to run over people in their cars either, but we need adults, not addicted recreational drug abusers.