London Underground Speed Limits and Signal Information

Isaac A made this Freedom of Information request to Transport for London

Automatic anti-spam measures are in place for this older request. Please let us know if a further response is expected or if you are having trouble responding.

The request was refused by Transport for London.

Dear Transport for London,

As a rail enthusiast, could I please see documents for:
- The speed limits of each section of track on the Underground
- Signal diagrams or other signal-related documents from the Northern and Jubilee lines prior to the implementation of ATO

Yours faithfully,
Isaac A

FOI, Transport for London

Dear Isaac

 

TfL Ref: FOI-2639-2122

 

Thank you for your request received by Transport for London (TfL) on 15
February 2022.

 

Section 8(1) of the Freedom of Information Act (FOIA) sets out the
requirements of a valid request for information and states that a request
must, amongst other things, “state the name of the applicant.” As a full
name has not been provided we are unable to treat this as a valid request.
If you could please provide your full name and then we will process your
request.

 

Please note the average speed of London Underground trains can be worked
out by looking at the timetables which can be found on the TfL website
here:

[1]https://tfl.gov.uk/corporate/publication...

If you go to page 2 of any timetable, it lists the distance between every
pair of stations, and the scheduled off-peak run time. Speed = distance
divided by time.

 

With regard to signal diagrams, this type of information is normally
exempt from disclosure. Please see [2]here for more details.

 

If we hear nothing further from you by 15 March your response will be
treated as a new request.

 

In the meantime, if you would like to discuss this matter further, please
do not hesitate to contact me.

 

Yours sincerely

 

Eva Hextall

FOI Case Management Team

General Counsel

Transport for London

 

 

show quoted sections

Dear FOI,

My full name is Isaac Alvarez. I am aware of the working timetables, but from that one can only calculate average speed (and even then only after unit conversions) as opposed to actual speed limits.

Yours sincerely,

Isaac A

FOI, Transport for London

Dear Mr Alvarez

 

TfL Ref: FOI-2639-2122

 

Thank you for your revised request received by us on 24 February 2022.

 

We will aim to issue a response by 24 March 2022 in accordance with the
Freedom of Information Act 2000 and our information access policy.

 

We publish a substantial range of information on our website on subjects
including operational performance, contracts, expenditure, journey data,
governance and our financial performance. This includes data which is
frequently asked for in FOI requests or other public queries. Please check
[1]http://www.tfl.gov.uk/corporate/transpar... to see if this helps you.

 

We will publish anonymised versions of requests and responses on the
[2]www.tfl.gov.uk website. We will not publish your name and we will send
a copy of the response to you before it is published on our website.

 

In the meantime, if you would like to discuss this matter further, please
do not hesitate to contact me.

 

Yours sincerely

 

Eva Hextall

FOI Case Management Team

General Counsel

Transport for London

 

 

 

 

show quoted sections

FOI, Transport for London

Dear Mr Alvarez

 

TfL Ref: FOI-2639-2122

 

Thank you for your revised request received by us on 24 February 2022,
asking for actual speed limits and signal diagrams on the London
Underground.

 

Your request has been considered under the requirements of the Freedom of
Information Act 2000 and our information access policy.  I can confirm we
do hold the information you require.

 

However, in accordance with the FOI Act, we are not obliged to supply the
speed and signal information you have requested as it is subject to
statutory exemptions to the right of access to information, under Section
38(1)(b) and Section 24 of the Act.

 

In this instance the exemptions have been applied as disclosure of this
information would be likely to adversely affect the safety and security of
TfL employees and members of the general public as well as national
security.

 

Disclosure of this information to you has to be regarded as a disclosure
to ‘the public at large’. This information could potentially be obtained
and utilised by individuals who may wish to use this detailed level
technical information to cause disruption or harm to the London
Underground network. It is our concern that the release of details about
the operating environment could be combined with other information already
in the public domain to help plan an attack. The signal information
provides precise locations of key parts of the network which could be used
to gain access to these areas. Disclosure could compromise the security
and safety preparedness on the London Underground’s network and disrupt
our services by highlighting areas on the network which could be
susceptible to being targeted. 

 

Whilst we make no suggestion that you would use the information for
anything other than your own personal interest and the use you outlined in
your request, the London Underground system is an attractive terrorist
target for several reasons including its importance to London and the
knock on effect to the nation’s economy if it is disrupted, the publicity
gained from attacking an iconic transport system and the attractiveness of
the system for a mass casualty attack due to its open, mass transport
nature. It is also important to the functioning of London and its economy.

 

The use of these exemptions is subject to an assessment of the public
interest in relation to the disclosure of the information concerned.
We recognise the need for openness and transparency by public authorities,
but in this instance the public interest in applying the exemption, in
order to minimise risks to operational resilience, safe operation of the
London Underground network, the welfare of staff and members of the
general public, outweighs the public interest in disclosure.

 

In applying the exemptions we have taken into account the
tribunal decision referred to in the following
link: [1]http://informationrights.decisions.tribu...

 

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

 

Eva Hextall

FOI Case Management Team

General Counsel

Transport for London

 

 

 

 

show quoted sections