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Summary of how countdown predicts bus arrival times

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Dear Transport for London,

I was wondering if you could provide me information on how exactly the countdown system determines the arrival times for buses?

Yours faithfully,

Matthew Robinson

FOI, Transport for London

Dear Mr Robinson

 

TfL Ref: FOI-3064-1920

 

Thank you for your email received by Transport for London (TfL) on 8
January 2020.

 

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

 

A response will be sent to you by 6 February 2020.

 

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 Officer

 

FOI Case Management Team

General Counsel

Transport for London

 

 

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FOI, Transport for London

1 Attachment

Dear Mr Robinson

 

TfL Ref: FOI-3064-1920

 

Thank you for your email received by Transport for London (TfL) on 8
January 2020.

 

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 do hold the information you require. You asked:

 

I was wondering if you could provide me information on how exactly the
countdown system determines the arrival times for buses?

 

The Countdown system uses a combination of real time vehicle location
data, scheduled information, short term data (such as recent journey time
conditions) and long term historical information to calculate when a bus
is expected to arrive at a bus stop.

 

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 Officer

 

FOI Case Management Team

General Counsel

Transport for London

 

 

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