Dear Freddie Poser

Our ref: FOI-2294-1920/GH

Thank you for your request received by Transport for London (TfL) on 31
October 2019 asking for information about London Underground usage.

Your request will be processed in accordance with the requirements of the
Freedom of Information Act and our information access policy.

A response will be sent to you by 28 November 2019. 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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References

Visible links
1. http://www.tfl.gov.uk/corporate/transpar...
2. http://www.tfl.gov.uk/
3. http://www.tfl.gov.uk/corporate/about-tfl/

Dear Freddie Poser

Our ref: FOI-2294-1920/GH

Thank you for your request received by Transport for London (TfL) on 31
October 2019 asking for information about London Underground usage.

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 see the attached file which provides the daily, monthly and yearly
ridership (number of passenger journeys) broken down by London underground
line.

For the whole network the total LU trips add up roughly to a) 5 million
per day and b) 120 million per month.

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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References

Visible links
1. http://www.tfl.gov.uk/corporate/about-tfl/

Dear Freddie

The information provided to you was data using the combination of
Origin-Destination data at every station, and a process of route
assignment modelling which assigns all the flows at every route on the
network.

The assignment is based on Generalised Journey Time, where each O-D trip
is assigned to the line or lines that deliver the quickest overall
journey. We then aggregate the flows by station/line/link. So, each line
load includes all flows assigned in each line after the route assignment
modelling. Therefore, for example, if a passenger first boarded a Victoria
line and then changed to the Northern line to complete their journey, the
journey would be recorded for both lines.

We provided the information to you in this way as you have requested
information split by line, but this does mean that adding all the journeys
results in the double (or triple) counting and incorrectly high totals
which you have noticed.  It is not possible to accurately split journeys
by London Underground line without getting these inflated figures. The
figures provided in the annual report are therefore correct.

I hope this clarifies the situation.

Kind regards

Graham Hurt

FOI Case Officer

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References

Visible links
1. http://www.tfl.gov.uk/corporate/about-tfl/