What do the N and S signs represent in the poem?

In A Roadside Stand, the “N” and “S” signs represent the directions to the north and south, symbolizing the geographical and social divide between the rural and urban areas. These signs guide the city dwellers through the countryside, but they also highlight the isolation of the rural people, as they are trapped in a place far removed from the opportunities and wealth of the city. The signs underscore the sense of separation and the struggle of the villagers to reach the prosperity that lies beyond their rural location. Through this imagery, Frost emphasizes the contrast between the rural community’s hopes and the urban indifference.

This question related to Poem 4 English Flamingo Class 12th NCERT.
From the Poem 4 A Roadside Stand.
Give answer according to your understanding.