M25 junction 10 to junction 16 smart motorway

We're improving the M25 between junction 10 and junction 16.

Region:  South East
Start date:  2020/21
Cost:  ¬£200million - ¬£400million
Status:  PLANNED
Type:  Major Scheme
End date:  2023
Programme:  Smart motorways

Progress report

We're currently working up smart motorway design options that will meet the aims of this scheme.

The government announced that the preferred solution was for a smart motorway with all-lane running at junctions 15 to 16 and also at junctions 10, 11 and 12. This means the existing hard shoulder would be converted into a traffic lane providing five lanes for traffic at junctions 15 to 16 and four lanes elsewhere. Emergency Areas are available in place of the hard shoulder for emergency use.

As part of this we'll assess a wide range of information about the road to establish the nature of the current problems. We have developed an outline design concept which has determined the most appropriate smart motorway operating regime for this section of road. We are currently working on the preliminary design details including the environmental assessment for the scheme. This is to support the concept design with a view of completing this stage by summer 2019.

We are liaising with local authorities and technical stakeholders so that we can take into account their views.

What's next?

Detailed design to enable construction to start in 2020.

Timeline

Government announces scheme December 2014
Works start 2020
Works complete 2023

Why we need this scheme

The M25 junctions 10 to 16 has the highest traffic flows on the strategic road network, with junctions 15 to 16 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 anticlockwise between junctions J9 and J8 . Lane Closures : The hard shoulder, lanes 1, 2 and 3 are closed. Reason : Emergency barrier repairs. Status : Currently Active. Period : expect disruption until 05:30 on 21 June 2019. Lanes Closed : There are three of four lanes closed.
Posted: June 20, 2019, 9:35 pm
Location : The A3 southbound at the junction with the M25 . Reason : Roadworks. Status : Currently Active. Period : from 22:08 on 20 June 2019 to 06:00 on 21 June 2019. Lanes Closed : All lanes are closed.
Posted: June 20, 2019, 9:10 pm
Location : The A3 southbound entry slip from the A245 . Lane Closures : Lane one is closed. Reason : Emergency roadworks. Status : Currently Active. Period : expect disruption until 05:30 on 21 June 2019. Lanes Closed : There is one of two lanes closed.
Posted: June 20, 2019, 9:02 pm
Location : The M25 clockwise between junctions J8 and J9 . Lane Closures : The hard shoulder, lanes 1 and 2 are closed. Reason : Emergency barrier repairs. Status : Currently Active. Period : expect disruption until 05:00 on 21 June 2019. Lanes Closed : There are two of four lanes closed.
Posted: June 20, 2019, 9:02 pm
Location : The A3 southbound between the A244 and the junction with the A247 . Reason : Emergency roadworks. Status : Currently Active. Period : expect disruption until 05:30 on 21 June 2019. Lanes Closed : All lanes are closed.
Posted: June 20, 2019, 9:01 pm
Location : The M25 anticlockwise entry slip at junction J10 . Reason : Roadworks. Status : Currently Active. Period : expect disruption until 05:30 on 21 June 2019. Lanes Closed : All lanes are closed.
Posted: June 20, 2019, 9:01 pm
Location : The A3 northbound between the M25 and the junction with the A245 . Lane Closures : Lanes 1 and 2 will be closed. Reason : Emergency roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 22:00 and 05:30 from 26 June 2019 to 28 June 2019. Schedule : From 23:00 on 28 June 2019 to 06:00 on 29 June 2019. Lanes Closed : There will be two of three lanes closed.
Posted: June 20, 2019, 2:52 pm
Location : The A3 northbound at the junction with the M25 . Reason : Emergency roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 22:00 and 05:30 from 26 June 2019 to 28 June 2019. Schedule : From 23:00 on 28 June 2019 to 06:00 on 29 June 2019. Lanes Closed : All lanes will be closed.
Posted: June 20, 2019, 2:52 pm
Location : The A3 southbound between the A309 and the junction with the A245 . Lane Closures : Lane one will be closed. Reason : Emergency roadworks are planned. Status : Pending. Schedule : From 22:00 on 25 June 2019 to 05:00 on 26 June 2019. Lanes Closed : There will be one of three lanes closed.
Posted: June 19, 2019, 2:52 pm
Location : The A3 southbound between the junctions with the A309 and the A244 . Lane Closures : Lane one will be closed. Reason : Emergency roadworks are planned. Status : Pending. Schedule : From 22:00 on 24 June 2019 to 05:00 on 25 June 2019. Lanes Closed : There will be one of three lanes closed.
Posted: June 19, 2019, 2:29 pm
Location : The M25 anticlockwise between junctions J10 and J9 . Lane Closures : The hard shoulder is closed. Reason : Barrier repairs. Status : Currently Active. Period : expect disruption until 23:59 on 30 June 2019.
Posted: June 19, 2019, 2:29 pm
Location : The M25 anticlockwise between junctions J9 and J8 . Lane Closures : Lane one will be closed. Reason : Emergency roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 22:00 and 05:00 from 24 June 2019 to 28 June 2019. Schedule : Expect disruption everyday between 22:00 and 05:00 from 1 July 2019 to 5 July 2019. Lanes Closed : There will be one of four lanes closed.
Posted: June 19, 2019, 2:29 pm
Location : The M25 clockwise between junctions J8 and J10 . Lane Closures : Lanes 2, 3 and 4 will be closed. Reason : Emergency roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 22:00 and 05:00 from 24 June 2019 to 26 June 2019. Lanes Closed : There will be three of four lanes closed.
Posted: June 19, 2019, 2:29 pm

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