While the Docklands Light Railway (DLR) in London is famous for being an automated, "driverless" system, it is not unstaffed. Every train has a Passenger Service Agent (PSA) on board. Although they do not sit in a traditional driver's cab—allowing passengers to sit at the very front for a "rollercoaster" view—the PSA is responsible for patrolling the train, checking tickets, and assisting passengers with enquiries. Crucially, they are trained to take manual control of the train using a hidden panel if a technical fault occurs or in an emergency. Additionally, while many smaller stations are unstaffed, major interchange stations have a visible staff presence to help with navigation and safety. The four underground stations on the network (Bank, Island Gardens, Cutty Sark, and Woolwich Arsenal) are always staffed to comply with fire and health and safety regulations for subsurface environments. So, while you won't see a driver steering, there is a dedicated human presence on every single journey to ensure the system runs smoothly and safely.