No, "ordinary" negligence justifies a charge of vehicular manslaughter, which has lesser penalties than plain manslaughter.
Even then, it seems like many states require "gross" negligence, like speeding or intoxication to charge with a crime. Someone who simply "didn't see the pedestrian" but was otherwise following the law will likely not be charged with a crime. They'll get sued, of course.
Even then, it seems like many states require "gross" negligence, like speeding or intoxication to charge with a crime. Someone who simply "didn't see the pedestrian" but was otherwise following the law will likely not be charged with a crime. They'll get sued, of course.