In cinema, trains are a rich and versatile metaphor, often symbolizing transition, fate, and the relentless passage of time. Because a train moves on a fixed track toward a predetermined destination, it frequently represents a character's "journey through life" or a path they cannot escape. In thrillers (like Hitchcock's Strangers on a Train), the "closed environment" of the carriages symbolizes entrapment and social tension, where characters are forced into proximity with strangers. Historically, trains served as a symbol of modernity and industrial progress, particularly in Westerns where the arrival of the tracks signaled the end of the "Wild West." In romantic dramas (such as Before Sunrise), the train represents a liminal space—a temporary world where normal social rules don't apply and life-changing connections can be made. Conversely, a train leaving a station is one of the most iconic cinematic symbols for loss, separation, and missed opportunity, emphasizing the finality of a choice made or a chance passed by.