How is the family that picks up the narrator in Story One of Jesus’ Son: Stories characterized?

The family is made up of a father, a mother, a toddler, and a baby. The narrator describes the caution with which the man at the wheel of that car drove, briefly recollects a few more details of his previous rides, describes the bad weather that night, and comments that he, like the baby lying unsecured in the back seat of the car, was asleep when the car was in an accident.