London Underground station delays

Roedd y cais yn llwyddiannus.

Dear Transport for London,

I would like to make a FOI request regarding historical station status data.
In particular, I'd like to access data regarding i) planned stations' closures; ii) un-planned stations' closures; iii) incidents that cause service disruption. I'm going to use this dataset to analyze delays and disruption in relation with passenger demand.
It would be perfect if you could provide the time span starting from 1st july 2019 to 1st July 2021.

If this information is not available at station level, it could suffice at line level.

Yours faithfully,
Federico Messa

FOI, Transport for London

Dear Federico Messa

 

Our ref: FOI-0600-2122/GH

 

Thank you for your request received by Transport for London (TfL) on 22
June 2021 asking for information about London Underground station delays.

 

We will issue you with a response by 20 July 2021 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

 

Graham Hurt

FOI Case Officer

FOI Case Management Team

General Counsel

Transport for London

 

 

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FOI, Transport for London

Dear Federico Messa

 

Our ref: FOI-0600-2122/GH

 

Thank you for your request received by Transport for London (TfL) on 22
June 2021 asking for information about London Underground station delays.

 

In order for us to try to provide you with the information you require, we
would be grateful if you could clarify a couple of points.

 

Please can you advise what format you would prefer this information in?

 

Can you also advise if you require the numbers totalled, or individual
incident data. If there is any other detail you can provide regarding what
information you would ideally require, this would help ensure we answer
your request as fully as possible.

 

Please note that we will not take any further action on your request until
you have provided further detail.

 

Yours sincerely

 

Graham Hurt

FOI Case Officer

FOI Case Management Team

General Counsel

Transport for London

 

 

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Dear Graham,

Thanks for the follow-up.
I would ideally require an excel or csv table with the following information:

Day an time of the day (timestamp)
Station name
Line name
Magnitude of the delay (duration)
Reason of the delay

It would be perfect to have a single entry for each delay.

Thanks again.
Yours sincerely,

Federico Messa

FOI, Transport for London

3 Atodiad

Dear Federico Messa

 

Our ref: FOI-0600-2122/GH

 

Thank you for your request received by Transport for London (TfL) on 22
June 2021 asking for information about London Underground station delays.

 

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

 

Please find attached a spreadsheet showing planned station/L&E closures. 
The second spreadsheet provides a list of incidents which caused
disruption to services and unplanned station closures.

 

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.

 

If you are not satisfied with this response please see the attached
information sheet for details of your right to appeal.

 

Yours sincerely

 

Graham Hurt

FOI Case Officer

FOI Case Management Team

General Counsel

Transport for London

 

 

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Dear Graham,
Thank you very much for the spreadsheets provided, this is the exact kind of information I need.

I just would like to have a couple of clarifications about a the fields in the spreadsheet "FOI 0600 2122.xlsx":

The "initial delay" is the expected delay at the beginning of the disruption, could you please clarify what the "0" value means?
The "duration" is the number of minutes of the delay, but it seems that some events are particularly long (more than a week), could you please clarify if it means that the event is actually that long and the disruption can be considered active for all the time period?

Yours sincerely,
Federico Messa

FOI, Transport for London

1 Atodiad

Dear Federico Messa

Thank you for your email.

Please accept my apologies, I should have also sent you the attached Guidance Note to assist you with the data provided.

The initial delay is the delay to the train service - the running of trains. Some incidents such as station closures may not delay the train service, and therefore these incidents may have an initial delay of "0", but a duration of 60 minutes for example which reflects the time a station is closed.

Taken from PDF:

Initial Delay
The number of minutes the train service is initially delayed for due to an incident.
Example: A customer is taken ill on a train and is helped off by station staff. The train is delayed departing by three minutes, and therefore the initial delay is three minutes.

Total Duration
Whilst initial delay only captures the initial delay to the train service, the total duration captures the full extent of an incident if it is more than a simple stop / start.
Example 3: If multiple trains are missing from service for the same reason the disruption maybe booked as multiple cancellations under one incident. This has been used regularly for lack of train operators due to COVID19. These incidents will appear with an initial delay of 0, but often a high figure for the duration. If 10 trains are missing from service for 10 hours each, this would be shown by a duration of 6000 minutes (based on 10 trains x 600 minutes).

I hope this clarifies your queries.

Kind regards

Graham Hurt

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Dear Graham,

Thanks for the quick reply, the Guidance Note and your explanation clarify exactly my doubts.

Yours sincerely,
Federico Messa