Request ID: FOI-0442-2122 Date published: 24 June 2021
You asked
Please could I request raw ATC data with the three-length class breakdown for the following site numbers in London: 14, 52, 179, 180, 181, 182, 183, 185, 186, 188, 189, 206, 207, 208, 209, 210, 211, 227, 242, 277, 290, 310, 311, 312.
If possible, I would like the data for the periods: March-August 2017 inclusive and Jan 2020 - present
We answered
TfL Ref: FOI-0442-2122
Thank you for your request of 2nd June 2021 asking for ATC traffic data.
Your request has been considered in accordance with the requirements of the Freedom of Information Act and our information access policy.
Specifically you asked:
“Please could I request raw ATC data with the three-length class breakdown for the following site numbers in London: 14, 52, 179, 180, 181, 182, 183, 185, 186, 188, 189, 206, 207, 208, 209, 210, 211, 227, 242, 277, 290, 310, 311, 312.
If possible, I would like the data for the periods: March-August 2017 inclusive and Jan 2020 - present”.
The spreadsheet attached provides the raw data from our Automatic Traffic Counters. As this is raw data please be aware of any gaps in the data due to potential outages. Note that there are two worksheets within the spreadsheet.
The following explains what each column refers to within the spreadsheet:
Sdate – Refers to the date and hour the data is recorded at
Cosit – this is the site ID so 21 refers to ATC 21 etc.
LaneNumb – refers to how many lanes are being counted at this site, each number is accompanied by a lane description and lane direction
LaneDescription – refers to the roads direction and which lane it is within that direction e.g. North Nearside
LaneDirection – splits the lanes into the flows of traffic so all travelling in one direction will have the same LaneDirection value
DirectionDescription – refers to just the direction the traffic travels down the road in
Column G is Volume: This will provide the total flow at that time in that lane.
Volume is further divided into classes 1, 2 and 3. This determines the size of the vehicle. Please note if the second loop at the ATC site is damaged the class volume cannot be recorded so all columns may be blank if this is the case. We do not validate the different class flows either so their accuracy cannot be as guaranteed as the ATC volume.
The class breakdown is as follows:
Class 1 - <5.2m
Class 2 – between 5.2m and 12m
Class 3 - >12m
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,
David Wells FOI Case Officer FOI Case Management Team General Counsel Transport for London
