Dear Transport for London,

Along the A1 Lyttelton Rd, just East of the junction with
Blandford Close, there are a set of signs either side of the road to show a change of speed limit from 30 - 40 mph and vice versa.

Recently, black boxes with padlocks have been mounted just below each of these signs facing oncoming traffic on either side of the road.
Please see this link for a photo:
https://ibb.co/album/esq6aa

I request the following information in regards to the described boxes:
1. What are these boxes? If they are a commercially sold product, what are they called?
2. What is the purpose of these boxes?
3. If information is collected by these boxes, what information is collected?
4. When were these boxes installed?
5. Who installed these boxes?
6. If these boxes are not permanent, when will they be removed?

Yours faithfully,

Mr Griver

FOI, Transport for London

Dear Mr Griver

 

Our ref: FOI-1166-1920/GH

 

Thank you for your request received by Transport for London (TfL) on 19
July 2019 asking for information about black boxes beneath speed limit
signs.

 

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

 

A response will be sent to you by 16 August 2019. 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

 

Graham Hurt

FOI Case Officer

FOI Case Management Team

General Counsel

Transport for London

show quoted sections

 

References

Visible links
1. http://www.tfl.gov.uk/corporate/transpar...
2. http://www.tfl.gov.uk/
3. http://www.tfl.gov.uk/corporate/about-tfl/

FOI, Transport for London

1 Attachment

Dear Mr Griver

 

Our ref: FOI-1166-1920/GH

 

Thank you for your request received by Transport for London (TfL) on 19
July 2019 asking for information about black boxes beneath speed limit
signs.

 

Your request has been considered under the requirements of the Freedom of
Information Act 2000 and our information access policy. Unfortunately we
do not hold the information you require.

 

We believe that the black boxes you are referring to are traffic survey
equipment recording vehicle counts, vehicle type and vehicle speeds, such
as these:

 

[1]http://www.ca-traffic.com/en/ca-solution...

 

Traffic surveys are usually conducted by external survey companies, that
company could be running the traffic survey for TfL, London Borough of
Barnet, a consultancy or any other organisation that has commissioned the
survey. The survey company should have requested permission from the
highway authority (TfL) to place the equipment on our network, but on this
occasion we have been unable to find any record relating to this location.

 

We therefore went out to the site to try to find out who installed the
boxes but found they have now been removed.

 

We therefore do not have the answers to the specific questions you have
raised.

 

If you are not satisfied with this response please see the attached
information sheet for details of your right to appeal.

 

Yours sincerely

 

Graham Hurt

 

FOI Case Officer

FOI Case Management Team

General Counsel

Transport for London

 

show quoted sections

 

References

Visible links
1. http://www.ca-traffic.com/en/ca-solution...
2. http://www.tfl.gov.uk/corporate/about-tfl/