Our ref:
FOI2024/01438
National Highways
National Traffic Operations Centre
3 Ridgeway
Daniel Rees
Quinton Business Park
request-1194043-
Birmingham
xxxxxxxx@xxxxxxxxxxxxxx.xxx
B32 1AF
Tel: 0300 123 5000
Dear Daniel Rees
Freedom of Information request: FOI2024/01438
Thank you for your information request dated 29 October 2024 regarding the A12
concrete reconstruction scheme between Marks Tey and Stanway (junctions 25 and
26).
We have dealt with your request under the provisions of the Freedom of
Information Act 2000.
Your Request (numbered for ease of reference):
I write to you under the Freedom of Information Act 2000 to request the following
information about the Marks Tey to Stanway resurfacing scheme.
Please can you provide the following information:
1. What was the final cost of the A12 Marks Tey to Stanway works when the project was
completed in October 2024
2. What was the total number of hours the A12 was fully closed (either northbound,
southbound, or both) from the start of the scheme to the end
3. What was the total number of miles of concrete road that was replaced with asphalt
4. As of October 2024, how many miles of the A12 road surface (complete from London
to Lowestoft) have a concrete surface, and how many miles have an asphalt surface?
Are there any other types of surface which make up the A12, and if so, what are they?
Our Response:
Registered office Bridge House, 1 Walnut Tree Close, Guildford GU1 4LZ
National Highways Limited registered in England and Wales number 09346363
1. Following a search of our records, and in accordan
ce with Section 1.1 of the
Freedom of Information Act, I confirm we do not hold the requested information as
yet.
With a scheme of this size and budget (approximately £40million), confirming the
final cost is likely to take several months.
2. We have used data held within our Network Events Management (NEM) database to
calculate a figure. However, it’s not designed for this as its function is primarily to
control, manage and record access to the strategic road network for roadworks
purposes.
To produce a figure, we have filtered NEM data using all of the elements that have
contributed to a carriageway closure of both the main A12 and its slip roads.
Please understand the calculation may not be wholly accurate. The way the data is
recorded means there are instances where a southbound junction 27 slip road
closure may have been double counted as we had to close it each time we closed
the southbound A12 from junctions 25 to 26. However, there are also occasions
where the junction 27 entry slip road will have been closed independently and it has
been too difficult to extract these in isolation. We have therefore worked on an
assumption that they are all instances where traffic has been excluded from the A12
for the concrete reconstruction scheme.
The figure does not include any occasion where traffic moved under contraflow. This
is because it’s not classed as a carriageway closure as traffic was not diverted from
the A12 onto other routes.
We therefore calculate the A12 was closed either northbound, southbound, or both,
including slip roads, for a total of 6193 hours and 14 minutes.
NB In relation to our response to questions 3 and 4, please note the following in relation
to our use of “lane kilometres” as a distance of measurement:
Lane kilometre means a kilometre-long segment of carriageway that is a single lane in
width.
We use lane kilometres to enable us to describe more accurately how a road surface is
treated.
For example, over the course of five kilometres, four kilometres of lane one may have a
concrete surface and one of surface dressing but lane two could have three kilometres
of concrete surface and two of surface dressing.
Registered office Bridge House, 1 Walnut Tree Close, Guildford GU1 4LZ
National Highways Limited registered in England and Wales number 09346363
3. The length of concrete road replaced is currently calculated as being 19.25 lane
kilometres (information not calculated or held in miles). This is subject to final
verification and includes both the main carriageway and slip roads.
4. We can only provide information in relation to the A12 between junction 11 (M25
junction 28 Brook Street Interchange) and junction 33 (A14 junction 55 Copdock
Interchange), which is the stretch of the A12 on the strategic road network that
National Highways is the responsible highway authority for.
Data extracted from our Programme Investment Toolkit provides the following
surface types as of October 2024 (all figures held are in lane kilometres not miles):
• Bituminous (an asphalt surface) – 318,563
• Pavement quality concrete (concrete suitable for a car to drive on) – 72,292
• Surface dressed (thin layer of bitumen/chippings on concrete) – 11,557
Transport for London is the highway authority responsible for the A12 between
Gallows Corner and the Brook Street Interchange. You can make a Freedom of
Information request through their website at
https://tfl.gov.uk/corporate/transparency/freedom-of-information/foi-make-request
Suffolk County Council is the highway authority for the A12 between A14 junction 58
(Seven Hills Interchange) and Lowestoft. Requests can be made of them by
emailing
xxx@xxxxxxx.xxx.xx
If you are not satisfied with our response you may ask for an internal review within 40
working days of receiving the response, by replying to this email. You can learn more
about the internal review pro
cess here.
If you are not content with the outcome of the internal review, you have the right to
apply directly to the Information Commissioner for a decision. The Information
Commissioner can be contacted
here or via the address below –
Information Commissioner’s Office
Wycliffe House
Water Lane
Wilmslow
Cheshire
SK9 5AF
Please remember to quote reference number
FOI2024/01438 in any future
communications about this response.
Kind regards
Operations East
Registered office Bridge House, 1 Walnut Tree Close, Guildford GU1 4LZ
National Highways Limited registered in England and Wales number 09346363
You can make new FOI requests and review published responses by visiting our
webform at https://foirequest.nationalhighways.co.uk/start
Registered office Bridge House, 1 Walnut Tree Close, Guildford GU1 4LZ
National Highways Limited registered in England and Wales number 09346363
