The roads that Mrs. Todd discovers bear a strong resemblance to the "highways in hiding" in The Dark Tower V: Wolves of the Calla.
Stephen King has acknowledged multiple sources of influence for this story, including Akira Kurosawa's Seven Samurai, its stepchild The Magnificent Seven, Sergio Leone's "Man with No Name" trilogy, and other works by Howard Hawks and John Sturges, among others.
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