Jeff asked: If a car hit a person that was part on sidewalk and part on road, on a private road with no stop sign, who is at fault?
On this site we don’t determine fault for incidents. That is done by law enforcement and the courts. We discuss the applicable laws. In your case, since the incident apparently occurred on private property, state traffic laws may not apply. You should consult an attorney. In some cases, local law enforcement has jurisdiction, but only under agreement between the owner and law enforcement. See this post.