M3 junctions 9 to 14: smart motorway

Upgrading the M3 between junction 9 (Winchester / A34 interchange) and junction 14 (M27 Southampton interchange) to an all-lane running smart motorway. The scheme was announced in 2015 by the government, and will link to the smart motorway scheme on the M27.

Region:  South East
Start date:  2019-20
Cost:  Â£139 million
Status:  PLANNED
Type:  Major Scheme
End date:  2021-22
Programme:  Smart motorways

Public consultation

Our statutory instrument public consultation is now open for you to give us your views. The consultation opened on 16 October 2019 and closes on 12 November 2019.

Have your say on our consultation page

Progress report

We’ll be getting the M3 ready to become a smart motorway early next year. This will involve clearing vegetation and repairing the hard shoulder.

We carried out four public information events in September to gather feedback on our design and inform people about smart motorways. Our brochure and the information banners we displayed are still available for you to view under 'Project media files and documents' below.

Please sign up to our email alerts to keep updated about the scheme and planned public events, and to learn more about the smart motorways programme.

Our summer 2019 newsletter is now available.

What's next?

We're starting advanced works early next year. This will include clearing vegetation and repairs to make sure the hard shoulder is fit for purpose and suitable for traffic when the main work starts.

Our key milestones are set out below:

  • Winter/spring 2020 - Undertake site clearance and preparation works for construction
  • 2020-22 - Construction of new smart motorway

Why we need this scheme

The M3 motorway is a key part of the strategic road network and provides a vital economic link from the Midlands (via the A34) and London to the major ports of Southampton and Portsmouth on the south coast (via the M27). Junctions 9 to 14 of the M3 are in southern Hampshire, England between Winchester and Southampton.

This route is heavily used by cars and freight, and faces congestion during peak travel hours caused by the volume of traffic using the network. In 2036, this section of the M3 (junction 9 to 14) is forecast to carry an average of between 63,000 and 86,000 vehicles per day, which is an increase of 20,000 vehicles compared 2015. Adding this additional infrastructure will enable forecast levels of traffic to flow freely on this section of the M3.

Aims

Through the use of CCTV, sensors and electronic signage, Highways England can manage the roads more effectively. By introducing this technology as well as additional safety features, the hard shoulder can be converted safely into a permanent running lane providing additional capacity in both directions.

This adds additional capacity, helps to reduce congestion and improves journey times for road users.

The scheme in detail

The M3 will be converted into a smart motorway between junction 9 (Winchester) and 14 (Southampton). This stretch of road is 10 miles long. There are slight variations of smart motorway that can be used depending on the layout and configuration of the road.

Between junction 9 (Winchester) to 13 (Eastleigh), the M3 will operate four-lanes in each direction. This is known as ‘all-lane running’ and involves the existing hard shoulder being converted into an additional lane for vehicles.

Road users driving northbound and joining the M3 at junction 14 where the roads converge from the M27 eastbound, westbound and from Southampton will see the M3 operate four lanes and a hard shoulder up to junction 13.

For road users driving southbound from junction 13 (Eastleigh) towards junction 14 (Southampton), the road will transition from four lanes with no hard should shoulder and then split into two separate roads to link to the M27 East and West.

The section of the M3 linking to the M27 eastbound will feature two lanes and a hard shoulder. The section of the M3 linking to the M27 westbound will comprise three lanes with no hard shoulder. The road layout into Southampton will remain as it is now.

The section from after junction 13 (Eastleigh) to junction 14 (Southampton) is a variation of smart motorway known as a ‘controlled motorway’.

Road users will see enhanced signage, information and the deployment of variable speed limits from overhead gantries from junction 9 to junction 14.

Project media files and documents

There are no images for this project
There are no videos for this project

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 A34 southbound between the A343 and the junction with the A303 . Lane Closures : Lane one is closed. Reason : Road Marking Works. Status : Currently Active. Period : expect disruption until 06:00 on 20 November 2019. Lanes Closed : There is one of two lanes closed.
Posted: November 19, 2019, 8:05 pm
Location : The A303 westbound between the M3 and the junction with the A34 . Lane Closures : Lane one is closed. Reason : Road Marking Works. Status : Currently Active. Period : expect disruption until 06:00 on 20 November 2019. Lanes Closed : There is one of two lanes closed.
Posted: November 19, 2019, 8:05 pm
Location : The M27 westbound between junctions J7 and J4 . Lane Closures : The hard shoulder, lanes 1 and 2 are closed. Reason : Roadworks. Status : Currently Active. Period : expect disruption until 06:00 on 20 November 2019. Lanes Closed : There are two of three lanes closed.
Posted: November 19, 2019, 8:03 pm
Location : The M27 westbound at junction J4 . Reason : Roadworks. Status : Currently Active. Period : expect disruption until 06:00 on 20 November 2019. Lanes Closed : All lanes are closed.
Posted: November 19, 2019, 8:03 pm
Location : The M27 eastbound between junctions J4 and J5 . Reason : Roadworks. Status : Currently Active. Period : from 19:52 on 19 November 2019 to 06:00 on 20 November 2019. Lanes Closed : All lanes are closed.
Posted: November 19, 2019, 7:53 pm
Location : The M27 westbound between junctions J7 and J4 . Reason : Roadworks scheme. Status : Currently Active. Period : from 20:03 on 15 November 2019 to 06:00 on 20 December 2019.
Posted: November 19, 2019, 6:33 pm
Location : The M27 eastbound between junctions J4 and J7 . Reason : Roadworks scheme. Status : Currently Active. Period : from 20:02 on 15 November 2019 to 06:00 on 14 December 2019.
Posted: November 19, 2019, 5:52 pm
Location : The M27 westbound between junctions J4 and J3 . Lane Closures : The hard shoulder is closed. Reason : Roadworks. Status : Currently Active. Period : expect disruption until 17:00 on 1 February 2020.
Posted: November 19, 2019, 5:49 pm
Location : The M27 eastbound at junction J3 . Lane Closures : The hard shoulder is closed. Reason : Roadworks. Status : Currently Active. Period : expect disruption until 17:00 on 1 February 2020.
Posted: November 19, 2019, 5:17 pm
Location : The M27 eastbound between junctions J3 and J4 . Reason : Roadworks scheme. Status : Currently Active. Period : from 09:22 on 8 March 2019 to 17:00 on 1 February 2020.
Posted: November 19, 2019, 5:17 pm
Location : The M27 eastbound between junctions J3 and J4 . Lane Closures : The hard shoulder is closed. Reason : Roadworks. Status : Currently Active. Period : expect disruption until 17:00 on 1 February 2020.
Posted: November 19, 2019, 5:17 pm
Location : The M3 westbound at junction J11 . Lane Closures : The hard shoulder is closed. Reason : Roadworks. Status : Currently Active. Period : expect disruption until 20:00 on 22 November 2019.
Posted: November 19, 2019, 5:10 pm
Location : The M27 eastbound between junctions J2 and J5 . Reason : Roadworks scheme. Status : Currently Active. Period : from 20:48 on 15 October 2019 to 06:00 on 13 January 2020.
Posted: November 19, 2019, 8:54 am
Location : The M3 eastbound at junction J11 . Lane Closures : The hard shoulder is closed. Reason : Roadworks. Status : Currently Active. Period : expect disruption until 20:00 on 22 November 2019.
Posted: November 19, 2019, 7:30 am
Location : The M3 eastbound at junction J11 . Lane Closures : The hard shoulder is closed. Reason : Roadworks. Status : Currently Active. Period : expect disruption until 06:00 on 16 December 2019.
Posted: November 19, 2019, 7:30 am
Location : The M27 westbound entry slip at junction J5 . Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 21:00 and 06:00 from 19 November 2019 to 21 November 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 25 November 2019 to 2 December 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 4 December 2019 to 6 December 2019. Lanes Closed : All lanes will be closed.
Posted: November 19, 2019, 6:09 am
Location : The M27 eastbound between junctions J3 and J5 . Lane Closures : Lanes 1, 2, 3 and 4 will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 21:00 and 06:00 from 19 November 2019 to 22 November 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 23 November 2019 to 29 November 2019. Lanes Closed : All lanes will be closed.
Posted: November 19, 2019, 6:08 am
Location : The M3 westbound between junction J14 and the M27 . Lane Closures : Lanes 1 and 2 will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 21:00 and 06:00 from 19 November 2019 to 22 November 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 23 November 2019 to 29 November 2019. Lanes Closed : All lanes will be closed.
Posted: November 19, 2019, 6:08 am
Location : The A34 southbound exit slip to the A303 . Reason : Road marking works are planned. Status : Pending. Schedule : From 21:00 on 19 November 2019 to 06:00 on 20 November 2019. Lanes Closed : All lanes will be closed.
Posted: November 19, 2019, 6:07 am
Location : The A303 westbound exit slip to the A34 . Reason : Road marking works are planned. Status : Pending. Schedule : From 21:00 on 19 November 2019 to 06:00 on 20 November 2019. Lanes Closed : All lanes will be closed.
Posted: November 19, 2019, 6:07 am
Location : The A303 westbound entry slip from the A34 . Reason : Road marking works are planned. Status : Pending. Schedule : From 21:00 on 19 November 2019 to 06:00 on 20 November 2019. Lanes Closed : All lanes will be closed.
Posted: November 19, 2019, 6:07 am
Location : The A303 westbound exit slip to the A34 . Reason : Road marking works are planned. Status : Pending. Schedule : From 21:00 on 19 November 2019 to 06:00 on 20 November 2019. Lanes Closed : All lanes will be closed.
Posted: November 19, 2019, 6:07 am
Location : The M271 southbound between the M27 and junction J1 . Lane Closures : Lanes 1 and 2 will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 21:00 and 06:00 from 19 November 2019 to 23 November 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 25 November 2019 to 30 November 2019. Schedule : From 21:00 on 2 January 2020 to 06:00 on 3 January 2020. Schedule : From 21:00 on 21 February 2020 to 05:30 on 23 February 2020. Lanes Closed : All lanes will be closed.
Posted: November 19, 2019, 6:07 am
Location : The M27 westbound exit slip at junction J5 . Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 21:00 and 06:00 from 18 November 2019 to 21 November 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 16 December 2019 to 20 December 2019. Lanes Closed : All lanes will be closed.
Posted: November 19, 2019, 3:44 am
Location : The M271 southbound between the M27 and junction J1 . Reason : Roadworks scheme. Status : Currently Active. Period : from 21:00 on 18 November 2019 to 05:30 on 23 February 2020.
Posted: November 18, 2019, 9:00 pm
Location : The A34 northbound. Reason : Roadside drains works are planned. Status : Pending. Schedule : From 20:00 on 25 November 2019 to 06:00 on 26 November 2019. Lanes Closed : All lanes will be closed.
Posted: November 18, 2019, 8:14 pm
Location : The A34 northbound between the A272 and the junction with the A303 . Lane Closures : Lane one will be closed. Reason : Roadside drains works are planned. Status : Pending. Schedule : From 20:00 on 25 November 2019 to 06:00 on 26 November 2019. Lanes Closed : There will be one of two lanes closed.
Posted: November 18, 2019, 8:14 pm
Location : The A34 northbound. Reason : Roadside drains works are planned. Status : Pending. Schedule : From 20:00 on 25 November 2019 to 06:00 on 26 November 2019. Lanes Closed : All lanes will be closed.
Posted: November 18, 2019, 8:14 pm
Location : The M27 eastbound at junction J4 . Lane Closures : Lane one will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : From 20:00 on 22 November 2019 to 06:00 on 23 November 2019. Schedule : From 20:00 on 29 November 2019 to 06:00 on 30 November 2019. Schedule : From 20:00 on 2 December 2019 to 06:00 on 3 December 2019. Schedule : Expect disruption everyday between 20:00 and 06:00 from 9 December 2019 to 14 December 2019. Lanes Closed : There will be one of two lanes closed.
Posted: November 18, 2019, 11:10 am
Location : The M27 eastbound between junctions J1 and J3 . Lane Closures : Lanes 1 and 2 will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : From 20:00 on 20 November 2019 to 06:00 on 21 November 2019. Lanes Closed : There will be two of three lanes closed.
Posted: November 18, 2019, 11:10 am
Location : The M27 eastbound between junctions J4 and J7 . Lane Closures : Lane one will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : From 20:00 on 22 November 2019 to 06:00 on 23 November 2019. Schedule : From 20:00 on 29 November 2019 to 06:00 on 30 November 2019. Schedule : From 20:00 on 2 December 2019 to 06:00 on 3 December 2019. Schedule : Expect disruption everyday between 20:00 and 06:00 from 9 December 2019 to 14 December 2019. Lanes Closed : There will be one of three lanes closed.
Posted: November 18, 2019, 11:10 am
Location : The M27 westbound between junctions J7 and J5 . Lane Closures : Lanes 1, 2 and 3 will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 21:00 and 06:00 from 25 November 2019 to 30 November 2019. Schedule : From 21:00 on 1 December 2019 to 06:00 on 2 December 2019. Lanes Closed : All lanes will be closed.
Posted: November 18, 2019, 11:10 am
Location : The M27 eastbound between junctions J1 and J3 . Reason : Roadworks scheme is planned. Status : Pending. Schedule : From 20:00 on 20 November 2019 to 06:00 on 21 November 2019.
Posted: November 18, 2019, 11:10 am
Location : The M3 westbound exit slip at junction J11 . Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 21:00 and 06:00 from 22 November 2019 to 25 November 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 29 November 2019 to 2 December 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 17 January 2020 to 20 January 2020. Schedule : Expect disruption everyday between 21:00 and 06:00 from 24 January 2020 to 27 January 2020. Lanes Closed : All lanes will be closed.
Posted: November 18, 2019, 11:10 am
Location : The M27 westbound entry slip at junction J5 . Reason : Roadworks scheme. Status : Currently Active. Period : from 00:00 on 14 November 2019 to 06:00 on 20 December 2019.
Posted: November 18, 2019, 11:10 am
Location : The A34 southbound. Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 21:00 and 06:00 from 25 November 2019 to 29 November 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 3 December 2019 to 5 December 2019. Lanes Closed : All lanes will be closed.
Posted: November 18, 2019, 11:10 am
Location : The M3 eastbound between junctions J12 and J9 . Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 21:00 and 06:00 from 22 November 2019 to 25 November 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 29 November 2019 to 2 December 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 17 January 2020 to 20 January 2020. Schedule : Expect disruption everyday between 21:00 and 06:00 from 24 January 2020 to 27 January 2020. Lanes Closed : All lanes will be closed.
Posted: November 18, 2019, 11:10 am
Location : The M3 eastbound between junctions J13 and J12 . Lane Closures : Lanes 1, 2 and 3 will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 21:00 and 06:00 from 22 November 2019 to 25 November 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 29 November 2019 to 2 December 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 17 January 2020 to 20 January 2020. Schedule : Expect disruption everyday between 21:00 and 06:00 from 24 January 2020 to 27 January 2020. Lanes Closed : All lanes will be closed.
Posted: November 18, 2019, 11:10 am
Location : The M27 westbound between junctions J5 and J3 . Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 21:00 and 06:00 from 25 November 2019 to 30 November 2019. Schedule : From 21:00 on 1 December 2019 to 06:00 on 2 December 2019. Lanes Closed : All lanes will be closed.
Posted: November 18, 2019, 11:10 am
Location : The M3 westbound at junction J11 . Lane Closures : Lanes 2 and 3 will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 06:00 and 20:00 from 23 November 2019 to 24 November 2019. Schedule : Expect disruption everyday between 06:00 and 20:00 from 30 November 2019 to 1 December 2019. Schedule : Expect disruption everyday between 06:00 and 20:00 from 18 January 2020 to 19 January 2020. Schedule : Expect disruption everyday between 06:00 and 20:00 from 25 January 2020 to 26 January 2020. Lanes Closed : There will be two of four lanes closed.
Posted: November 18, 2019, 11:10 am
Location : The M3 westbound between junction J14 and the M27 . Reason : Roadworks scheme. Status : Currently Active. Period : from 20:02 on 15 November 2019 to 06:00 on 15 January 2020.
Posted: November 18, 2019, 11:10 am
Location : The A34 southbound exit slip to the A303 . Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 21:00 and 06:00 from 25 November 2019 to 29 November 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 3 December 2019 to 5 December 2019. Lanes Closed : All lanes will be closed.
Posted: November 18, 2019, 11:10 am
Location : The M3 eastbound exit slip at junction J11 . Lane Closures : Lanes 1 and 2 will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 21:00 and 06:00 from 22 November 2019 to 25 November 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 29 November 2019 to 2 December 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 17 January 2020 to 20 January 2020. Schedule : Expect disruption everyday between 21:00 and 06:00 from 24 January 2020 to 27 January 2020. Lanes Closed : All lanes will be closed.
Posted: November 18, 2019, 11:10 am
Location : The M3 eastbound between junctions J12 and J11 . Lane Closures : Lanes 2 and 3 will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 06:00 and 20:00 from 23 November 2019 to 24 November 2019. Schedule : Expect disruption everyday between 06:00 and 20:00 from 30 November 2019 to 1 December 2019. Schedule : Expect disruption everyday between 06:00 and 20:00 from 18 January 2020 to 19 January 2020. Schedule : Expect disruption everyday between 06:00 and 20:00 from 25 January 2020 to 26 January 2020. Lanes Closed : There will be two of four lanes closed.
Posted: November 18, 2019, 11:10 am
Location : The M27 westbound at junction J4 . Lane Closures : Lane two will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : From 20:00 on 22 November 2019 to 06:00 on 23 November 2019. Schedule : Expect disruption everyday between 20:00 and 06:00 from 25 November 2019 to 27 November 2019. Lanes Closed : There will be one of two lanes closed.
Posted: November 18, 2019, 11:10 am
Location : The M3 westbound between junction J14 and the M27 . Lane Closures : Lane two will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : From 20:00 on 22 November 2019 to 06:00 on 23 November 2019. Schedule : From 20:00 on 29 November 2019 to 06:00 on 30 November 2019. Schedule : From 20:00 on 2 December 2019 to 06:00 on 3 December 2019. Schedule : From 20:00 on 6 December 2019 to 06:00 on 7 December 2019. Lanes Closed : There will be one of two lanes closed.
Posted: November 18, 2019, 11:10 am
Location : The M27 westbound between junctions J7 and J4 . Reason : Roadworks scheme is planned. Status : Pending. Schedule : From 20:00 on 22 November 2019 to 06:00 on 27 November 2019.
Posted: November 18, 2019, 11:10 am
Location : The M3 westbound entry slip at junction J9 . Reason : Roadworks are planned. Status : Pending. Schedule : From 21:00 on 17 November 2019 to 06:00 on 18 November 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 22 November 2019 to 25 November 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 29 November 2019 to 2 December 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 17 January 2020 to 20 January 2020. Lanes Closed : All lanes will be closed.
Posted: November 18, 2019, 11:10 am
Location : The M27 westbound between junctions J7 and J4 . Lane Closures : Lanes 2 and 3 will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : From 20:00 on 22 November 2019 to 06:00 on 23 November 2019. Schedule : Expect disruption everyday between 20:00 and 06:00 from 25 November 2019 to 27 November 2019. Lanes Closed : There will be two of three lanes closed.
Posted: November 18, 2019, 11:10 am
Location : The M3 eastbound exit slip at junction J11 . Lane Closures : Lanes 1 and 2 will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 06:00 and 21:00 from 23 November 2019 to 24 November 2019. Schedule : Expect disruption everyday between 06:00 and 21:00 from 30 November 2019 to 1 December 2019. Schedule : Expect disruption everyday between 06:00 and 21:00 from 18 January 2020 to 19 January 2020. Schedule : Expect disruption everyday between 06:00 and 21:00 from 25 January 2020 to 26 January 2020. Lanes Closed : All lanes will be closed.
Posted: November 18, 2019, 11:10 am
Location : The M27 westbound between junctions J7 and J5 . Reason : Roadworks scheme is planned. Status : Pending. Schedule : From 21:00 on 25 November 2019 to 06:00 on 2 December 2019.
Posted: November 18, 2019, 11:10 am
Location : The M3 westbound between junctions J8 and J12 . Lane Closures : Lanes 1 and 2 will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 21:00 and 06:00 from 22 November 2019 to 25 November 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 29 November 2019 to 2 December 2019. Schedule : Expect disruption everyday between 21:00 and 06:00 from 17 January 2020 to 20 January 2020. Schedule : Expect disruption everyday between 21:00 and 06:00 from 24 January 2020 to 27 January 2020. Lanes Closed : All lanes will be closed.
Posted: November 18, 2019, 11:10 am
Location : The M27 westbound between junctions J7 and J4 . Reason : Roadworks scheme. Status : Currently Active. Period : from 23:59 on 13 November 2019 to 06:00 on 23 November 2019.
Posted: November 18, 2019, 11:10 am

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