M25 junction 10 to junction 16 smart motorwayRecently updated

We are improving the M25 between junction 10 and junction 16.

Region:  South East
Start date:  Before the end of March 2020
Cost:  £335.5 to £478.9 million
Status:  PLANNED
Type:  Major Scheme
End date:  TBC
Programme:  Smart Motorways

Progress report

We are currently working up smart motorway design options that would meet the aims of this scheme.

The government announced that the preferred solution was for a smart motorway with “All Lane Running” at J15 to J16 and also at J10, J11 and J12. This means the existing hard shoulder would be converted into a traffic lane providing five lanes for traffic at J15-J16 and four lanes elsewhere. Regular refuge areas are available in place of the hard shoulder for emergency use.

As part of this we will assess a wide range of information about the road to establish the nature of the current problems. This will help us develop an outline design concept and determine the Smart Motorway operating system best suited to this section of road. We aim to complete this first design stage by the end of May 2017.

We will also liaise with local authorities and technical stakeholders so we can take into account their views.

What's next

The next phase of design will begin in summer 2017.

Timeline

Government announces scheme December 2014
Works start 2019/2020
Works complete TBC

Why we need this scheme

The M25 J10-J16 has the highest traffic flows on the strategic road network with junctions 15 to 16 being a particular problem area being situated between two major motorways (the M40 and M4). Junctions 10 to 16 runs through areas of the Metropolitan Green Belt and several urban and suburban settlements. Junction 14 connects the M25 directly to London Heathrow Airport.

The two way vehicle flows on the section exceed 200,000 vehicles per day which results in frequent congestion and severe delay to road users.

A separate scheme is proposed for the interchange at junction 10.

A separate strategic study is looking at longer term options to improve the performance of the transport network between junctions 10 and 16 of the M25.

Aims

This scheme aims to:

  • reduce congestion and delays
  • improve journey time reliability
  • maintain a high standard of safety
  • support economic growth and job creation

Project media files and documents

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Project timeline

Planned roadworks

Roadworks and Events for England

The latest incident information for England's motorway and trunk routes provided by Highways England

Location : The M25 clockwise between junctions J10 and J11 . Lane Closures : Lanes 1, 2 and 3 will be closed. Reason : Road repairs are planned. Status : Pending. Schedule : Expect disruption everyday between 21:30 and 05:30 from 26 June 2017 to 30 June 2017. Schedule : From 22:00 on 30 June 2017 to 06:00 on 1 July 2017. Lanes Closed : There will be three of four lanes closed.
Posted: June 24, 2017, 7:53 pm
Location : The A3 northbound exit slip to the M25 . Reason : Roadworks are planned. Status : Pending. Schedule : From 22:00 on 27 June 2017 to 05:00 on 28 June 2017. Lanes Closed : All lanes will be closed.
Posted: June 22, 2017, 9:59 am
Location : The M25 clockwise between junctions J8 and J9 . Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 09:30 and 16:00 from 26 June 2017 to 30 June 2017.
Posted: June 20, 2017, 11:20 pm
Location : The M25 anticlockwise between junctions J9 and J8 . Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 09:30 and 16:00 from 26 June 2017 to 30 June 2017.
Posted: June 20, 2017, 11:20 pm

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