Punctuality 

What?
 * Describes Henry's nature.
 * Shows the World State outside of the workplace.
 * Shows the effects of the social hierarchy.

Why?
 * Continue to show the importance of the social hierarchy.
 * Give the readers a better picture of the World State in its entirety.

How?
 * Dialogue between Henry and Lenina
 * Description of the surroundings seen by Lenina and Henry while traveling
 * Shows Lenina's beliefs about the superiority of her caste.