Here are three sources that may help you with “Where Three Roads Meet”.
The first is a review written by Salley Vickers for The Guardian. You can read it by clicking here. In addition to summarizing the story of Oedipus, Vickers’ critiques Freud’s theory by suggesting that Freud emphasizes the story of the child who kills his father and beds his mother, while failing to recognize the equally important story of the parents who disastrously fail to murder their child.
This second source is from Liz Gloyn’s excellent blog, Classically Inclined. You can read her insightful, short post here.
The third source I’ve selected is a literary analysis of the role of Tireseas, the seer, in the novel. It’s a bit longer and denser than the other two pieces, but for those of you with time on your hands, you can read it here.