Project Profile: Docklands Light Railway (DLR) Modernisation and Capacity Enhancement

This project profile details the comprehensive modernisation and capacity enhancement of London’s Docklands Light Railway (DLR), a vital automated light metro system. The programme encompasses the complete replacement of legacy rolling stock with a new high-capacity fleet, significant infrastructure modifications, and continuous upgrades to its advanced Communications-Based Train Control (CBTC) system to meet escalating passenger demand across East London’s key economic zones.

Technical Specifications

The core of the DLR’s capacity enhancement is the Rolling Stock Replacement Programme, which introduced 54 new high-capacity B23 trains from manufacturer CAF. These five-car, fixed-formation units replace the older B90, B92, and B07 fleets, increasing overall network capacity by over 30%. The trains feature a modern walk-through design, real-time passenger information systems, mobile device charging points, and dedicated wheelchair and multi-use areas. A critical upgrade was the introduction of on-board air conditioning, a significant improvement for passenger comfort.

Operationally, the DLR relies on the Thales SelTrac CBTC moving block system, which enables Grade of Automation 4 (GoA4) unattended train operation. This technology allows for minimal headways between trains, maximising line throughput. The integration of the new CAF fleet required extensive software updates to the central control system and onboard train control modules to ensure seamless and safe operation. Supporting infrastructure works included platform lengthening at key stations, reinforcement of viaducts to handle the increased weight and length of the new trains, and upgrades to the traction power supply system across the network.

Key Takeaways

• Successful Fleet Integration: The project demonstrates the successful introduction and integration of a new, high-capacity rolling stock fleet onto a live and complex automated light metro network without major service disruption.
• CBTC as a Capacity Multiplier: The programme reaffirms the critical role of advanced Communications-Based Train Control (CBTC) signaling in maximising network throughput and operational flexibility on constrained urban rail infrastructure.
• Phased Modernisation Strategy: The DLR’s evolution highlights the necessity of a phased, long-term investment strategy to incrementally adapt and upgrade legacy rail systems to accommodate future population growth and ongoing economic development.

Frequently Asked Questions (FAQ)

What new trains are running on the DLR?

The DLR is now served by a new fleet of 54 modern, high-capacity trains manufactured by CAF. These trains are longer, feature a walk-through design for better passenger distribution, and are equipped with modern amenities such as air conditioning, USB charging ports, and improved accessibility features.

Why was the DLR network upgraded?

The DLR network was upgraded to increase capacity and improve reliability to meet the rapidly growing passenger demand in East London, particularly in areas like Canary Wharf and the Royal Docks. The modernisation, including new trains and control system updates, ensures the DLR can support London’s economic growth and provide a more comfortable and efficient service for millions of passengers.