The kids must walk along State Route 318 both literally and figuratively. The highway symbolizes the journey John must take to mature and learn about himself as he comes of age.

John has new discoveries and learning experiences as he treks to Brighton Ranch. For instance, John is reminded of the importance of being kind despite the challenging situation. He allows Cleverly and Will to come along, which will prove essential to his ability to reach Brighton Ranch and get Stew the help he needs.

The desolate highway journey reveals that John misjudged Will and Cleverly, who are much more assertive and helpful than he initially gave them credit for. He also realizes he’s been misjudging Stewart’s depressed mood and allows himself to reflect on what Stewart must be going through. He suddenly understands his brother’s emotions: Stew has been craving John’s attention. He wants John to ask how he’s feeling, rather than making decisions without him. John realizes that acting in his brother’s best interest does not mean dragging him to Brighton Ranch; instead, it means listening to him and accepting what he says. The shift in John’s relationships with Stew, Will, and Cleverly illustrates his growth and maturity.