Good Samaritan Laws

Driving across the country, two twenty-something grad students were blindsided by a drunk driver. He crossed over four lanes and collided head on with their ‘97 Buick. Aren't blindside and head on inconsistent? Multiple cars stopped, as the highway was now blocked, but no one came to their assistance until the ambulance arrived some time later. While morally questionable, should the failure of the onlookers to be Good Samaritans and attempt to aid if it was possible, or at the very least to pick up the phone and call for assistance, be declared a criminal offense? Although at first glance, requiring individuals to aid their fellow man if possible appears moral, ultimately such laws would not serve a greater purpose or effectuate change.