FOI request detail

Gunnersbury Lane carriage way

Request ID: FOI-0821-1718
Date published: 03 August 2017

You asked

I am concerned about the temporary and permanent speed notification signs, such as 30mph signs painted on the road surface or temporary or permanent 30mph or 40mph signs installed, being when exactly these were painted or installed. I am also interested in knowing exactly when the 4 lane dual carriage way Gunnersbury Ave was changed to 1 lane North bound. Perhaps in view of your offer you can attempt to obtain this information for me.

We answered

Our ref: FOI-0821-1718/GH


Thank you for your request received by Transport for London (TfL) on 5 July 2017 asking for information about Gunnersbury Lane.


Your request has been considered under the requirements of the Freedom of Information Act 2000 and our information access policy. I can confirm that we do hold the information you require.


Please see below the briefing lines which were provided at the time of the works. All will have involved the provision of 30 and 40mph signage both on sign posts and as carriageway markings, and the relevant dates are provided:


“A temporary 30mph speed restriction is in place on the A406, north of the Chiswick roundabout. The limit on the A406 Gunnersbury Avenue has been reduced to 30mph from 40mph, to ensure the safety of all road users and contractors working onsite to replace the Power Road Bridge. The Temporary Traffic Order allowing for the speed limit reduction came into force on 2 June 2014. Signage for the temporary 30mph speed limit was installed in May 2015 to coincide with the start of bridge works. Signage for the 30mph speed limit was installed at the termination points of the limit, as described in Temporary Traffic Order GLA 2014 No 0269.


The 30mph limit described above was extended in the northbound direction for around 150 metres to a point adjacent to Gunnersbury Park under Temporary Traffic Order GLA/2016/0237 around 10 July 2016. Local stakeholders had requested this extension, to ensure that the full extent of a pedestrian diversion route (which was in place as a result of the bridge replacement works) was contained within the extent of the 30mph limit.


Additional carriageway markings were installed overnight on 13/14 July 2016. Three pairs of large “30” signs (TSRGD number 1065) were installed on the carriageway of the A406 Gunnersbury Avenue. This included one pair at the terminal signs just to the south of Larch Drive, one pair by the safety camera pole near to Manor Gardens and a third pair approximately half way between those two points.


The single lane closure in the north bound direction was first installed on 21 June 2016 until the 27 June 2016 and then again from 18 July 2016 to the present day to accommodate the diversion of utilities from the road bridge to the new service bridge and other works connected to the bridge replacement. This lane closure will be in place until the completion of the bridge replacement project.”


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


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

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