This constant travel underscores Walter's sense of dislocation; he has no family, no real home, and no real country. Through travel, Walter is able to avoid permanent connections, to escape responsibilities, and to remain completely unknown and unjudged.
This constant movement emphasizes Walter's state of homelessness; he has no permanent ties, a true place to call home, or a genuine sense of identity. By traveling, Walter can temporarily evade accountability, flee responsibilities, and remain invisible to the world.