In the excerpt from "Anthem," by Ayn Rand, the narrator travels through an abandoned underground tunnel. She describes how they go below ground into a large tunnel and see the "long thin tracks of iron," which is not iron. They also touch the cold and smooth train or subway tracks, and crawl forward intending to find out where the tracks take to.
it shows that the character doesn't want others to see how they are really feeling, this could be an act of foreshadowing meaning that later on they do end up showing their true feelings