New York City subway trains are operated by MTA Train Operators, who are highly trained civil servants responsible for the safety and timing of the system. While some lines in 2026 use Communications-Based Train Control (CBTC)—a form of automation that handles the speed and spacing of trains—a human operator is still present in the front cab of every passenger train. Their role is to monitor the tracks for obstacles, manage the opening and closing of doors, and take manual control in the event of an emergency or signal failure. To become a train operator, individuals must pass a rigorous multi-choice exam, undergo a medical and drug assessment, and complete a multi-month training program. On some lines, you may also see a Conductor in the middle of the train who is specifically in charge of making announcements and ensuring the platform is clear before the train departs. Despite advancements in tech, the human operator remains a vital "fail-safe" for the world's largest subway system.