M25 Junctions 23-27: Smart Motorway

Project status:   Current


Start date:   February 2013
End date:  October - December 2014


Type:   Major Scheme
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Major Scheme

Part of our programme of improvements (value >10m)

Cost:  £188 million *


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Update - September 2014

The construction work between junctions 23 and 25 is now complete.

Work continues between junctions 25 and 27. This should be completed by the end of 2014.

Current Work

  • We are completing verge works from Bell Common Tunnel to junction 27.  These include installing slot drains, verge hardening, signage, ducting, cabling, new lighting installation, bored piling, sheet piling, earthworks cuttings and embankments.
  • We are switching traffic onto the existing hard shoulder and lanes 1 and 2 to commence central reservation construction from Bell Tunnel to Junction 27.
  • Work is ongoing in the central reservation regarding site clearance, barrier and lighting removal, excavation of soft central reservation, drainage upgrade, new capping and sub-base layers, concrete pavement and slip formed concrete barrier.
  • We are installing portal and cantilever gantries from the River Lee to Junction 27.
  • We are continuing with pavement repairs.

 M25 Smart Motorways Scheme Junctions 25-27

 Improvements to the M25 coming shortly!

During 2014 the Highways Agency the Highways Agency opened two sections of smart motorways on the M25, junctions 5 to 7 on the Kent/Surrey border and junctions 23 to 25 on the Hertfordshire/Essex border. In November 2014, a new improved section of the M25 will open, improving journeys for road users and benefiting the economy.

The new section of smart motorway will open between junctions 25 and 27 on the Hertfordshire/Essex border. On the new M25 sections the hard shoulder will be used as a permanent traffic lane. This is referred to as ‘all lane running’

How to use All Lane Running

There is no hard shoulder on these sections of motorway; there is a broken white line between each lane, indicating that all lanes have the same status. Refuge areas are available for emergency use. The variable speed limits will be used to adjust speed limits during busy periods to control the flow of vehi-cles and prevent traffic grinding to a halt. The current speed limit will be dis-played on signs over or at the side of the carriageway. We use a red X sym-bol to show that a lane is closed because of an incident or some other obstruction, or people working in the road. Driving in a lane with a red X sym-bol is dangerous. You could be prosecuted.

What do I do if I need to stop?

Do not stop on the motorway unless unavoidable. If you need to stop in an emergency, use an emergency refuge area, motorway service area or leave at the next junction. If that is not possible try and get your vehicle off the carriageway, if it is safe to do so.

If you have no choice but to stop in a live lane put your hazard warning lights on to help other drivers see you and help Highways Agency control room staff to spot you on CCTV. If you are in the left hand lane and it is safe to do so, exit the vehicle via the left hand door. Wait behind the barrier if possible. If you cannot exit the vehicle, do not feel it is safe to do so or there is no other place of relative safety, remain in the vehicle. Keep your seat belt on and dial ‘999’.

Get smart, know your motorways…

Smart motorways use technology to help relieve congestion and make journey times more reliable. This includes controlling speeds to improve traffic flow providing better information to drivers on overhead signs. Most recognisably the hard shoulder can be converted to a traffic lane at peak times, or permanently, with emergency refuge areas. This extra lane increases capacity to reduce congestion while maintaining safety.

The improvements are being delivered at a significantly lower cost than a conventional motorway widening scheme and with less impact on the environment during construction.

It is important to the Agency that all road users understand the layout, and signs used on our smart motorways sections. So we are urging all road users to find out more about the different types of technology and features used.

What are the benefits?

Smart motorways relieve congestion and smooth the flow of the traffic, improving safety and journey times, and supporting economic development.

We already have evidence of the benefits a smart motorway scheme can bring. The first smart motorway opened to traffic on the M42 in the Midlands in 2006; analysis of the data gathered since opening found that journey times improved, and emissions reduced due to traffic flowing more smoothly.

In addition, personal injury accidents have reduced by more than half since hard shoulder running was introduced; with an overall reduction in the severity of accidents.

The ‘Get Smart’ campaign has been created to help road users understand the different driving environments, types of signs and signals they will see and what to do in the event of a breakdown when travelling on a smart motorway. Each of these key themes is easily identifiable through a series of icons that appear on all of the campaign materials and on the Agency’s website.

How do I find out more information?

For M25 scheme specific information follow the links:

M25 Junctions 5-7 http://​www​.highways​.gov​.uk/​r​o​a​d​s​/​r​o​a​d​-​p​r​o​j​e​c​t​s​/​m​2​5​-​j​u​n​c​t​i​o​n​s​-​5​-7/

M25 Junctions 23-27 http://​www​.highways​.gov​.uk/​r​o​a​d​s​/​r​o​a​d​-​p​r​o​j​e​c​t​s​/​m​2​5​-​j​u​n​c​t​i​o​n​s​-​2​3​-​27/

You can find out more about smart motorways by visiting the Highways Agency webpage via the following link:

www​.highways​.gov​.uk/​s​m​a​r​t​m​o​t​o​r​w​ays

Or follow us on our Facebook page:

https://​www​.facebook​.com/​p​a​g​e​s​/​S​m​a​r​t​-​M​o​t​o​r​w​a​y​s​-​M​2​5​/​1​3​9​8​4​4​2​1​7​3​7​2​6​130

If you have any further queries please contact the Highways Agency Information Line by emailing ha_​info@​highways.​gsi.​gov.​uk or calling 0300 123 5000.

The Project Team is conducting a publicity campaign to:

  • advise motorway traffic of the carriageway closures in advance
  • inform the local community of the closures and the diversion

We recognise that the closures affect both the travelling public and the local community and are therefore taking all possible steps to minimise disruption and inconvenience to all parties.

Should you have any questions regarding these plans, please contact our Contractor's Community Relations team on 01727 744933 or communityrelationsj2​3​-​2​7​.​m2​5​@​sbbjv.​co.​uk.

Drivers will benefit from the full completion of the scheme later this year.

The M25 Managed Motorway Scheme between junctions 25 and 27 is being carried out by Skanska Balfour Beatty Joint Venture for Connect Plus working on behalf of the Highways Agency.

 All lane running

As part of our smart motorway initiative, the new road layout for this section of the M25 will involve “all lane running”. This means the hard shoulder is permanently converted into a traffic lane on these sections of the motorway.

Instead of the hard shoulder you will see regularly spaced emergency refuge areas, each one with an emergency telephone. We have also installed CCTV cameras to help us spot incidents and deal with them as fast as possible. Put your hazard lights on to help us.

If you cannot reach an emergency refuge, the smart motorway technology allows us close any lane by displaying a red “X” on the gantries, moving traffic away from the incident and keeping it clear for emergency vehicles. Do not drive in a lane with a red “X” displayed over it.

'All lane running' increases the capacity of the motorway to reduce congestion and make your journey more reliable. It does this at a lower cost and with less disruption than a traditional road widening scheme.

Current Work

  • We are switching traffic onto the existing hard shoulder and lanes 1 and 2 to commence central reservation construction from the River Lee to Junction 26.
  • Work is also ongoing regarding site clearance, barrier and lighting removal, excavation of soft central reservation, drainage upgrade, new capping and sub-base layers.
  • We are installing portal and cantilever gantries from the River Lee to junction 27.
  • We are continuing with pavement repairs.
  • We are continuing verge works from junction 26 to Junction 27.  These include installing slot drains, verge hardening, signage, ducting, cabling, new lighting installation, bored piling, sheet piling, earthworks cuttings and embankments.

What is happening?

We have developed proposals to provide smart motorway (previously known as managed motorways) on the M25 between junctions 23 and 27. Smart motorways help relieve congestion by using technology to vary speed limits. They also allow the hard shoulder to be used as a running lane to create additional capacity. They deliver these benefits at a significantly lower cost than conventional motorway widening and with less impact on the environment during construction.

Find out more about smart motorways.

When and where is this happening?

The scheme improvements will be made between junction 23 [A1(M) South Mimms] and junction 27 [M11(J5)] of the M25.

Construction work on this scheme commenced in February 2013.

Why is this happening and what will it cost?

The M25 is one of Europe's busiest motorways, handling around 200,000 vehicles every day. It is at the core of our network and is suffering from increasing congestion levels and journey times. We need to manage traffic flows better and to help achieve this we have already widened the carriageways from junctions 16 to 23, and from junctions 27 to 30, from 3 to 4 lanes in each direction.

The Secretary of State decided that this section of motorway could be improved by the introduction of a system to replace the hard shoulder with a fourth running lane (otherwise known as Smart Motorways - All Lanes Running).

Our aim is to provide the minimum amount of improvements necessary to deliver the safe operation of smart motorways.

Widening of the M25 is one of the recommendations of the Orbit Multi Modal Study which reported in November 2002. The study was tasked with addressing the problems of the M25 motorway and the orbital transport corridor around London. The study involved widespread public consultation and looked at the current problems and potential solutions to them. The report recommended that most of the dual 3 lane sections of the M25 should generally be widened to dual 4 lanes. The other sections to be widened were:

M25 Jct 16 to 23 (M40 - A1 (M)) - 21.8 miles (35 kilometres) - CompletedM25 Jct 27 to 30 (M11 - Dartford) - 14.3 miles (23 kilometres) - CompletedM25 Jct 5 to 7 (Sevenoaks to Redhill) - 12.2 miles (16 kilometres)M25 Jct 1b to 3 (Dartford - M20) - 3.1 miles (5 kilometres) - Completed

* The estimated outturn cost of £195 million was approved by the Secretary of State in November 2012 prior to the start of construction. The current forecasted cost for this scheme is £188 million as at the end of May 2013.

How will the scheme be carried out?

A number of cameras, information signs and signals on gantries will be installed as part of the improvement scheme. As the scheme design progresses we will provide more information on the location of these features. Using our knowledge of operating the M42 and M6 managed motorway schemes we have developed the smart motorway concept. These developments include permanently converting the hard should to a running lane and developing the design so that schemes will have:

  • Fewer overhead gantries which span the whole motorway.
  • Fewer signals over each lane and more verge mounting signing.
  • Comprehensive CCTV cameras – although there will no longer be the need for the dedicated cameras and operating systems required for opening and closing the hard shoulder.

Signs and signals will still be used to inform drivers of conditions on the network and when variable speed limits are in place.

What are the benefits?

This project will relieve congestion and smooth the flow of the traffic, improving safety and journey times. These benefits will also support economic development in the region.

We already have evidence of the benefits that a smart motorway scheme can bring. The first smart motorway scheme opened to traffic on the M42 motorway in 2006. Recent analysis of the data gathered since opening has found that journey time reliability improved by 22 per cent and reduced emissions by up to 10 per cent due to traffic flowing more smoothly.

In addition, personal injury accidents have reduced by more than half (55.7%) since hard shoulder running was introduced. There was also an overall reduction in the severity of accidents with zero fatalities and fewer seriously injured.

How do I find out more information ?

More information will be posted on this project page as it becomes available. You can subscribe to be alerted when updates are made.

If you have any queries about this project you should contact the Highways Agency Information Line by emailing ha_​info@​highways.​gsi.​gov.​uk or calling 0300 123 5000.

Site office:

M25 Smart Motorway Improvement Works - Junctions 23 to 27
Sanska Balfour Beatty Joint Venture
London Colney, St Albans
Hertfordshire
AL2 1FF

Email: communityrelationsj2​3​-​2​7​.​m2​5​@​sbbjv.​co.​uk
Telephone: 01727 744933

The office is opened between 0700 and 1900 Monday to Friday, and 0700 and 1300 on Saturday, closed on Sunday. 

Making Part 1 Claims

Once the notices are issued, Part 1 claims for the M25 junctions 23 to 27 Smart Motorway Scheme will be processed by the National Part 1 Claims Team in Birmingham. Find out more about Part 1 claims.

Part 1 claims submitted in respect of the M25 Junctions 16 to 23 and junctions 27 to 30 schemes are being managed by the Design Build Finance and Operate (DBFO) company Connect Plus. All requests for further information relating to Part I claims on these schemes should therefore be directed to Connect Plus who can be contacted at Connect Plus House, St Albans, South Mimms, Potters Bar EN6 3NP or by telephone on 02033 868500. The contact for Part I claims at Connect Plus is John Worsfold.

Details of scheduled roadworks are provided to help you plan your journey. Please note that works are weather- and resource- dependent and may need to be cancelled at short notice. This information is not updated in real time so please check Traffic England for current traffic conditions. Diversion timings are approximate and act as a guide only.

Will there be roadworks?

Yes, roadworks will be needed but three lanes of the M25 will be kept open in each direction at peak times during construction. We will close lanes at times of reduced traffic flow for essential night time works. These closures will be agreed in advance with local police and stake holders.

Adavnce notice of planned overnight carriageway closures

As part of the works, we need to close sections of the motorway between junctions 25 and 27 on certain occasions. The closures are required in order to install gantries and for the installation of new signal gantries spanning the carriagway.

M25 junctions 25 to 27 clockwise carriageway closed for gantry work midnight to 5:30am on Tuesday 16 September 2014

M25 junctions 27 to 25 anti-clockwise carriageway closed for gantry work midnight to 5:30am on Wednesday 17 September 2014.  The diversion route will be along the A10, A406 and M11 and will be clearly signed.

Road Works

DateDurationDetailsAllow an Extra
Friday 24 October11pm to 5:30amM25 Junctions 25 to 26 clockwise carriageway - 3 lanes closed.Anticipated delay approximately 15 minutes
Friday 24 October11pm to 5:30amM25 Junction 25 clockwise carriageway entry slip road closed - Diversion via M25 junction 24.Anticipated delay approximately 15 minutes
Friday 24 October11pm to 5:30amM25 Junction 26 to 25 anti-clockwise carriageway - 2 lanes closed.Anticipated delay approximately 10 minutes
Friday 24 October11pm to 5:30amM25 Junction 26 clockwise carriageway exit slip road closed - Diversion to M25 junction 28.Anticipated delay approximately 15 minutes
Friday 24 October11pm to 5:30amM11 Southbound to M25 anti-clockwise carriageway link road closed - Diversion to M25 junction 28.Anticipated delay aproximately 15 minutes
Saturday 25 October10pm to 5:30amM25 Junctions 25 to 26 clockwise carriageway - 3 lanes closed.Anticipated delay approximately 15 minutes
Saturday 25 October10pm to 5:30amM25 Junction 25 clockwise carriageway entry slip road closed - Diversion via M25 junction 24.Anticipated delay approximately 15 minutes
Saturday 25 October10pm to 5:30amM25 Junctions 26 to 25 anti-clockwise carriageway - 2 lanes closed.Anticipated delay approximately 10 minutes
Saturday 25 October10pm to 5:30amM11 Southbound carriageway to M25 anti-clockwise carriageway link road closed - Diversion to M25 junction 28.Anticipated delay approximately 15 minutes
Saturday 25 October10pm to 5:30amM11 Northbound carriageway to M25 anti-clockwise carriageway link road closed - Diversion to M25 junction 28.Anticipated delay approximately 15 minutes
Sunday 26 October10:30pm to 5:30amM25 Junctions 25 to 26 clockwise carriageway - 2 lanes closed.Anticipated delay approximately 10 minutes
Sunday 26 October10:30pm to 5:30amM11 Northbound carriageway to M25 anti-clockwise carriageway link road closed - Diversion to M25 junction 28.Anticipated delay approximately 15 minutes
Monday 27 October10pm to 5:30amM25 Junctions 26 to 27 anti-clockwise carriageway - 2 lanes closed (4 lane section).Anticipated delay approximately 10 minutes
Monday 27 October10pm to 5:30amM25 Junctions 25 to 26 clockwise carriageway - 2 lanes closed.Anticipated delay approximately 10 minutes
Monday 27 October10pm to 5:30amM11 Northbound to M25 anti-clockwise carriageway link road closed - Diversion to M25 junction 28.Anticipated delay approximately 15 minutes
Tuesday 28 October10pm to 5:30amM25 Junctions 25 to 26 clockwise carriageway - 2 lanes closed.Anticipated delay approximately 10 minutes
Tuesday 28 October10pm to 5:30amM25 Junctions 27 to 26 anti-clockwise carriageway - 3 lanes closed (4 lane section).Anticipated delay approximately 15 minutes
Tuesday 28 October10pm to 5:30amM25 Junctions 26 to 27 clockwise carriageway - 2 lanes closed.Anticipated delay approximately 10 minutes
Tuesday 28 October10pm to 5:30amM25 Junctions 26 anti-clockwise carriageway exit slip road closed - Diversion to junction 25Anticipated delay approximately 15 minutes
Tuesday 28 October10pm to 5:30amM25 Junction 26 anti-clockwise carriageway entry slip road closed - Diversion to junction 28.Anticipated delay approximately 15 minutes
Wednesday 29 October10pm to 5:30amM25 Junctions 27 to 26 anti-clockwise carriageway - 2 lanes closed (4 lane section).Anticipated delay approximately 10 minutes
Wednesday 29 October10pm to 5:30amM25 Junctions 26 to 27 clockwise carriageway - 2 lanes closed.Anticipated delay approximatley 10 minutes
Wednesday 29 October10pm to 5:30amM25 Junctions 26 to 25 anti-clockwise carriageway - 2 lanes closed.Anticipated delay approximately 10 minutes
Wednesday 29 October10pm to 5:30amM25 Junction 26 anti-clockwise carriageway exit slip road closed - Diversion to junction 25.Anticipated delay approximately 15 minutes
Wednesday 29 October10pm to 5:30amM25 Junction 26 anti-clockwise entry slip road closed - Diversion to junction 28.Anticipated delay approximately 15 minutes
Thursday 30 October10pm to 5:30amM25 Junctions 27 to 26 anti-clockwise carriageway - 2 lanes closed (4 lane section).Anticipated delay approximately 10 minutes
Thursday 30 October10pm to 5:30amM11 Northbound to M25 clockwise carriageway link road closed - Diversion to M25 junction 26.Anticipated delay approximately 15 minutes
Thursday 30 October10pm to 5:30amM25 Junctions 26 to 27 clockwise carriageway - 2 lanes closed.Anticipated delay approximately 10 minutes
Friday 31 October11pm to 5:30amM25 Junctions 26 to 27 clockwise carriageway - 2 lanes closed.Anticipated delay approximately 10 minutes
Friday 31 October11pm to 5:30amM11 Northbound to M25 clockwise carriageway link road closed - Diversion to M25 junction 26Anticipated delay approximately 15 minutes
Friday 31 October11pm to 5:30amM25 Junction 27 clockwise carriageway link to M11 Northbound and Southbound closed - Diversion via junction 28Anticipated delay approximately 15 minutes
Saturday 01 November10pm to 5:30amM25 Junction 25 to 27 clockwise carriageway - 2 lanes closedAnticipated delay approximately 10 minutes
Saturday 01 November10pm to 5:30amM25 clockwise carriageway entry slip road closed - Diversion via junction 25Anticipated delay approximately 15 minutes
Saturday 01 November10pm to 5:30amM25 Junction 26 clockwise carriageway exit slip road closed - Diversion to junction 28.Anticipated delay approximately 15 minutes
Sunday 02 November10:30pm to 5:30amM25 Junctions 25 to 26 clockwise carriageway - 3 lanes closed.Anticipated delay approximately 15 minutes
Sunday 02 November10:30pm to 5:30amM25 Junction 26 clockwise carriageway exit slip road closed - Diversion to junction 28.Anticipated delay approximately 15 minutes
Sunday 02 November10:30pm to 5:30amM25 Junction 25 clockwise carriageway entry slip road closed - Diversion via M25 junction 24.Anticipated delay approximately 15 minutes
ADVANCE WARNING
Wednesday 05 NovemberMidnight to 5:30amM25 Junction 27 anti-clockwise carriageway closed for road marking and traffic management removal works. Traffic will be diverted from junction 27 via M11, A406, A10 to rejoin the M25 at junction 25. There will be no access to the M25 anti-clockwise carriageway from M11.Anticipated delay approximately 30 minutes
Thursday 06 NovemberMidnight to 5:30amM25 Junction 27 anti-clockwise carriageway closed for road marking and traffic management removal works. Traffic will be diverted from junction 27 via M11, A406, A10 to rejoin the M25 at junction 25. There will be no access to the M25 anti-clockwise carriageway from M11Anticipated delay approximately 30 minutes

How will you manage traffic?

During construction CCTV cameras will be installed on the motorway to support the management of incidents. The CCTV team will promptly identify incidents and notify our vehicle recovery teams to assist stranded motorists. A free vehicle recovery service will be provided within the roadworks.

We will provide facilities for stranded motorists where they can make arrangements to continue their onward journeys.

Will there be diversions?

Clearly signed diversions will be in place when road closures are necessary.

ActivityDate
Public Information Exhibition12 & 13 October 2012
Public Consultation3 December 2012 to 21 January 2013
Start of worksFebruary 2013
Start of work on Central ReserveMid July 2013
CompletionBetween October & December 2014

Business Case

M25 Junctions 23 to 27 Managed Motorways - Business Case
Business Case - Information correct as at December 2010

Leaflet

M25 Junctions 23-27 Smart Motorway - Smart Motorways Leaflet
M25 Junctions 23-27 Smart Motorway - Get smart know your motorways
M25 Junctions 23-27 Managed Motorways - Closure Information Leaflet
M25 Junctions 23-27 Managed Motorways - Closure Information Leaflet - March 2013

Legal

Newsletter

M25 Junctions 23-27 Managed Motorways Newsletter No 3
Welcome to our third newsletter. Work to bring junctions 23 to 25 up to all lane running standard has been completed.
M25 Junctions 23-27 Managed Motorways Newsletter No 2
Welcome to our second newsletter. Since our last update, work to convert junctions 23 – 27 to a managed motorway has seen significant progress and is on target.
M25 Junctions 23-27 Managed Motorways Newsletter No 1
Welcome to the first report on progress to convert the M25 to a managed motorway between junctions 23 – 27.

Other

M25 Junctions 23-27 Smart Motorways - Safety Project Control Framework Products
Safety Plan, Hazard Log Report and Safety Report for the M25 Junctions 23-27 Smart Motorways scheme.

Report

M25 Junctions 23 to 27 Managed Motorways - Summary of Consultation Responses
Summary of Consultation Responses Managed Motorways – All Lanes Running M25 J23 to J27
M25 Junctions 23-27 Managed Motorways - Environmental Assessment Report
For a copy of the Environmental Assessment Report for this scheme please email the team at:M25J23toJ27MM@highways.gsi.gov.uk