Under the Freedom of Information Act 2000, I request the details of how QSI results are calculated on London Buses. I am specifically after guidance on the details of QSI calculations - and the details hat constitutes a QSI observation, including things like the 30% rule and the 4 stops rule for both high and low frequency routes.

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Our ref: FOI-1362-2021

Thank you for your request received by Transport for London (TfL) on 18 October 2020 asking for information about buses.

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 requested. You asked:

Under the Freedom of Information Act 2000, I request the details of how QSI results are calculated on London Buses. I am specifically after guidance on the details of QSI calculations - and the details that constitutes a QSI observation, including things like the 30% rule and the 4 stops rule for both high and low frequency routes.

Please find attached the information you requested.

If this is not the information you are looking for, please do not hesitate to contact me.

If you are considering submitting a further FOI request please think carefully about whether the request is essential at this current time, as answering FOI requests will require the use of limited resources and the attention of staff who could be supporting other essential activity. Where requests are made, please note that our response time may be impacted by the current situation.

Please see the attached information sheet for details of your right to appeal.

Yours sincerely,

Melissa Nichols

FOI Case Officer

General Counsel

Transport for London

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