What is the main conflict in The Switchman by Juan Jose Arreola?

"The Switchman" is a dialogue between an anonymous traveler and a switchman on the railroads, in which the railroader details the horrors of the sub-operational rail system. He describes areas where one or no rails exist, facades of stations designed to trick passengers into disboarding, and the slim odds of the stranger ever reaching his destination. On one level the story operates as a satire on the Mexican transportation system, while on another the railroad is an analogy for the hopeless absurdity of the human condition.