New DLR trains plan as TfL sets out what it is doing to get them running after delay

DLR B23 train on test run to Canary Wharf
-Credit: (Image: TfL)


Transport for London (TfL) has outlined what it plans to do next in order to roll out its new DLR trains. This has been delayed - with officials originally planning to introduce them later this year - due to a technical issue.

Trains had to be slowed down after engineers noticed that they were travelling too quickly on some sections of the network. Bosses say staff identified 'issues relating to the integration between the train and signalling systems and how these behave in conditions of poor railhead adhesion'.

Experts have now developed a plan to 'overcome these issues'. In response to a freedom of information request, a TfL case officer detailed that, while doing this, workers identified 'a pre-existing technical issue within the legacy signalling system'. This is what resulted in speed restrictions being introduced in some sections across the DLR network.

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A general view looking out from a DLR, Docklands Light Railway train
DLR trains have had to be slowed down -Credit:John Keeble/Getty Images

The officer added: "Work is underway to optimise these speed restrictions, which will hopefully minimise the impact to customers on the DLR network. As a result of the legacy signalling issue, further detailed analysis is also required for the new trains, alongside existing software modifications.

"This has meant the new DLR trains will not be able to be introduced this year. We do now have a solution for the new trains to enter passenger service, but the initial programme is currently being stress-tested and optimised. A series of modifications to the train and signalling have been, or are in the process, of being implemented to address this issue."

The authority was also asked how much cash the issues have cost to taxpayer. The TfL officer answered: "Any cost or other impacts associated with this delay have yet to be assessed."

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