F/O to 3136-1819 Thank you for your most helpful answers to my questions. As a follow up, also under the Freedom of Information Act, please can you help me with some more questions, as follows: From reading the AQN report, on p. 33in the penultimate paragraph, it says: “The change in road layout, removal of a bus lane and decrease in predicted average speeds from 23 km/h to 6 km/h at R57 (Hammersmith Road) offsets the predicted reduction in traffic at this location.” This makes it clear that TfL has calculated detailed models of the reduction of traffic speeds along the proposed CS9 route. Therefore, please can you disclose all the projected changes in traffic speeds along CS9 that were provided to AECOM for this study. According to the Appendix on p.59, this was provided on 19th and 21st December 2017 and 3rd January 2018. Please can you also explain why the speed data is metric, in kph rather than in common usage in the UK, which is mph? What evidence is there to suggest that a motivating factor was a desire to make the speeds appear less slow? Has this speed data been shared with the London Borough of Hammersmith & Fulham? Is so, when and if not, why not?

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TfL Ref: 0447-1920

Thank you for your request received by Transport for London (TfL) on 12 May 2019 asking for some further information about CS9.

Your request has been considered in accordance with the requirements of the Freedom of Information Act and our information access policy. I can confirm that we hold some of the information you require.

The data provided to AECOM is in a spatial file format known as a shapefile. We can supply you these files for the base, future and proposed scenarios for the AM and PM peaks, however you will require specialist software - a GIS based tool - to be able to open and view the files. With this in mind, please let us know if you wish us to share these files and we can arrange to provide them to you. The reason the information provided is in KPH is that our traffic models and the air and noise quality data calculations use this metric system. We do not hold information on the second part of your question.

These specific files have not been shared with London Borough of Hammersmith and Fulham. The files were extracted from our traffic modelling tools and passed to AECOM to enable them to carry out the air quality and noise assessment for this scheme. This assessment has been shared with the London Borough of Hammersmith and Fulham.

If this is not the information you are looking for, or if you are unable to access it for any 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

Sara Thomas

FOI Case Management Team

General Counsel

Transport for London

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