Final answer:
The road is described as a "valley of ashes" in 'The Great Gatsby', symbolizing moral decay, but not directly alluding to T.S. Eliot's 'The Waste Land' or the River Styx.
Step-by-step explanation:
The road between West Egg and East Egg in F. Scott Fitzgerald's novel The Great Gatsby is described as a "valley of ashes." This imagery symbolizes the moral decay hidden behind the facade of wealth and opulence, and it serves as a critical juncture between the glittering mansions of the Eggs and the impoverished wastelands surrounding New York City. While it is a powerful and evocative scene in the story, it is not a literary allusion to The Waste Land by T.S. Eliot, nor does it directly reference the mythological River Styx. However, it can be interpreted metaphorically to reflect similar themes of desolation and decay that are present in Eliot's work.