What is chapter 12 about?

Highway 66 is the main migrant road stretching from the Mississippi River to Bakersfield, California. It is a road of flight for refugees from dust and poverty. The people stream out onto Highway 66, risking the breakdown of their undependable cars on the way. And the travelers face other obstacles. California is a big state, but not big enough to support all of the workers who are approaching The border patrol can turn people back. The high wages that are promised may be a deception.