How does William Carlos Williams use imagery in Overture to a Dance of Locomotives?

Not only does Williams use poetic form to recreate the surging and stopping of trains, he also wants to recreate the symphony of sounds in the station. In a train station you hear trains, announcements, dialogue, and music, each overlapping the other. Such is the case in "Overture to a Dance of Locomotives." Williams presents various sounds, even if they interrupt the flow of the poem, in an attempt to show that, ultimately, the scene is not one of chaos but one of order, like the poem itself.