Pedestrians always have the right of way ... on roads where they can be. Pedestrians and cyclists are forbidden on 70 mph highways. If I ever see someone on foot on such highway, after doing my best to avoid that person, I'll call 911 asap to report it.
For anyone mad enough to claim right of way toward a pedestrian, in any situation, just think about the shitload of legal hurdles awaiting you down the road. Not worth it by any standard.