The descriptions of The Museum of Modern Art (MOMA) where you can see this painting says it all:
This work resulted from a composite representation of several gasoline stations seen by the artist. The light in this painting—both natural and artificial—gives the scene of a gas station and its lone attendant at dusk an underlying sense of drama. But rather than simply depicting a straightforward narrative, Hopper’s aim was “the most exact transcription possible of my most intimate impressions of nature”—in this case, the loneliness of an American country road. Fellow artist Charles Burchfield believed these paintings would remain memorable beyond their time, because in his “honest presentation of the American scene . . . Hopper does not insist upon what the beholder shall feel.”