FOI request detail

driverless carriage tech for the DLR

Request ID: FOI-2928-1718
Date published: 08 February 2018

You asked

Would you be able to estimate for me approx how much it cost to develop the driverless carriage tech for the DLR? And approx how much to install? And can you confirm as per the Wikipedia page about the DLR that there have only been 3x incidents with collisions/derailments since the start of the DLR, and two of those were due to human error?

We answered

TfL Ref: FOI-2928-1718

Thank you for your request received by Transport for London (TfL) on 11 January 2018 asking for information about the Docklands Light Railway.

Your request has been considered in accordance with the requirements of the Freedom of Information Act and our information access policy. I can confirm we hold some of the information you require.

We have searched our records and located the following instances of derailments and collisions on the Docklands Light Railway:


  1. North Quay Junction Derailment (10/01/1992)*


  2. Island Gardens (12/08/1992)*


  3. Poplar Curve (10/08/1995)*


  4. Approaching Canary Wharf (23/10/1995)*


  5. Deptford Bridge (04/04/2008) – Human Error


  6. West India Quay (10/03/2009) – Human Error


  1. 29/04/1991*

*Denotes that we do not have a reportable record of the cause of this incident due to the time that has elapsed. It is likely we hold details within our archives, however it would not be possible to locate, extract and collate this information within the confines of the cost exemption applicable to the FOI Act.

Under section 12 of the FOI Act, we are not obliged to comply with a request if we estimate that the cost of determining whether we hold the information, locating and retrieving it and extracting it from other information would exceed the appropriate limit. This is calculated at £25 per hour for every hour spent on the activities described. We estimate that locating this information would exceed this limit.

However, I understand that our Corporate Archives team have already been in touch with you regarding the information you have requested in relation to the cost to develop and install the driverless technology and so you may wish to discuss with them directly if you require more details on the incidents described above.

If this is not the information you are looking for, or if you are unable to access it for some reason, please do not hesitate to contact me.

Please see the attached information sheet for details of your right to appeal as well as information on copyright and what to do if you would like to re-use any of the information we have disclosed.

Yours sincerely

Lee Hill

Senior FOI Case Officer

FOI Case Management Team

General Counsel

Transport for London

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