Please provide as much detail as possible on the hourly traffic volumes for the period 2010-2019 on the A501, Marylebone Road, as close as possible to Marylebone Road air quality monitoring station for academic research. If possible, it would be useful to know the breakdown of different vehicle types on these roads, i.e. car (petrol, diesel, hybrid, electric), bus, HGVs, bicycle etc. for estimating non-exhaust emissions

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TfL Ref: 0818-1920

Thank you for your request received by us on 20 June 2019 asking for information about hourly traffic volumes on Marylebone Road from 2010 to 2019.

Your request has been considered in accordance with the requirements of the Environmental Information Regulations and our information access policy. I can confirm that we some of the information you require. You asked for:

hourly traffic volumes for the period 2010-2019 on the A501, Marylebone Road, as close as possible to Marylebone Road air quality monitoring station for academic research. If possible, it would be useful to know the breakdown of different vehicle types on these roads, i.e. car (petrol, diesel, hybrid, electric), bus, HGVs, bicycle etc. for estimating non-exhaust emissions

Please find attached data relating to the Automatic Traffic Counter (ATC) located on Marylebone Road inclusive of full location coordinates. The spreadsheet consists of a date range commencing from 1 April 2013 through to 23 June 2019, which is the latest information we have available. As the start date is the actual date the site became operational, data prior to this is not available.

This data has been extracted via our ATC Patched Database, meaning that any gaps within the data due to mechanical or communications failure have been patched using substitution tables which provide the best possible estimate. These values are highlighted within the table via the ‘Patched Column’. Patch Type One means a five minute gap within the hour has been identified. If the number of missing five minute periods for the hour exceeds six, this is identified as Patch Two. Patch Type Three is when 75% of the total vehicle count for the hour is missing, this normally refers to a full site outage.

The data is provided in hourly outputs, per day, per direction. Unfortunately we do not have the capability to provide vehicle breakdown from this site, therefore total flows are the only figure recorded.

I hope you find the data supplied useful for your work, please note this data should be only be used for the purpose it is provided for and is not to be passed on to other parties.

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

Jasmine Howard
FOI Case Officer
Information Governance
Transport For London

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