Division Street functions as a visual symbol of the rigid social and economic hierarchies that determine the characters’ identities and destinies. It is the literal and figurative line that bisects Thomaston, separating the working-class West End from the middle-class East End, creating invisible walls that shape opportunity and self-perception. Lucy notes, “Like Gaul[, Thomaston] is divided into three parts […] The two largest sectors are located on opposite sides of—if you can believe it—Division Street” (11). This explicit division provides a foundation for the novel’s exploration of class, geography, and destiny. The Lynch and Marconi families’ moves across this street from the West to the East End are pivotal events representing their pursuit of the American Dream, though Big Lou and Mr. Marconi’s careers as “route men” subsequently pull them in opposite directions: Big Lou’s “plum route” in the affluent Borough and Mr. Marconi’s route in the “Gut,” the worst part of the West End, reinforce their perceived class statuses and fuel their quiet rivalry, symbolizing economic pressures that lift Big Lou and the Lynch family while dragging the Marconis back down to the lower socioeconomic rung they’ve just left.  Each man’s path is circumscribed by the town’s geography, his identity tied to the neighborhood he serves. Tessa Lynch’s theory of “clean fingernails” further explains the social psychology Division Street enforces, where people align themselves with those who have more, not less. Ultimately, the street symbolizes a predetermined destiny that characters struggle against.