The Docklands Light Railway (DLR) in London is a sophisticated automated driverless system. In 2026, the network is in the final stages of a major fleet overhaul, replacing older stock with 54 state-of-the-art walk-through trains featuring air conditioning and mobile charging. While the trains do not have a traditional "driver" in a front cab—allowing passengers to sit at the very front for a "rollercoaster" view—they are not entirely unstaffed. Each train is managed by a Passenger Service Agent (PSA). These agents are responsible for patrolling the carriages, checking tickets, and manually controlling the doors at stations. In the event of a technical fault or emergency, the PSA can take manual control of the train using a hidden console. This "Grade of Automation 3" system ensures high frequency and reliability while maintaining a human presence for safety and customer assistance.