Show FullscreenThe work in the Neasden Depot area required live interface testing with the Jubilee Lines SelTrac system.UK:Hitachi Railhas completed what it says is the most technically challenging milestone to date underTransport for Londons ongoing Four Lines Modernisation programme to upgrade the signalling onLondon Undergrounds Circle, District, Hammersmith City and Metropolitan lines.The latest phase covers the Neasden Depot area, and required integration with legacy interlocking infrastructure and live interface testing with the Jubilee Lines SelTrac system.Delivering this phase demanded live system switching, real-time data synchronisation, and co-ordination across multiple lines, all with minimum disruption to operations, said Clarke Walker, Project Director, Hitachi rail UK, on July 1. Its a testament to the capability of our teams and our close collaboration withTfL.TfLs Director of Operational Readiness Peter McNaught said the successful integration of this new section brings us even closer to delivering faster, more frequent and more reliable journeys for millions of passengers.The 4LM programme covers the replacement or modernisation of life-expired assets covering 310 km and 113 stations on the four large-profile Sub-Surface Lines which make up 40 of the London Underground network and parts of which date back to 1863.TopicsHitachiLondon UndergroundMetrosignallingTransport for LondonUK