Or more, maybe ? He does have to live with the guilt of what he has done for the rest of his life. It was an accident , he didn’t leave the house with the intention of smashing headlong into an oncoming car. 2 seconds earlier and he would have missed them, 2 seconds later and they would be past the point of impact.
As I read it he pleaded not guilty, so I think he will be more sorry for Himself than the two children.
Secondly it was not an accident. Accidents are unavoidable. He could have avoided the collision by driving within the rules of the road.
I would vote yes for leathal injection as a punishment.