M23 junctions 8 to 10: smart motorwayRecently updated

Upgrading the 11 mile (18km) stretch of the M23 near Gatwick Airport, between junction 8 near Merstham and junction 10 at Copthorne, to an all-lane running smart motorway.

Region:  South East
Start date:  March 2018
Cost:  ¬£158.4 million
Status:  PLANNED
Type:  Major Scheme
End date:  January 2020
Programme:  Smart Motorways

Progress report

We recently held a Public Information Exhibitions at Gatwick Airport and at Nutfield Lodge in Redhill. Members of the public had the opportunity to meet with members of the project team and learn more about the scheme. Information regarding the Public Information Exhibitions can be found in the Media and documents section under 'Public Information Exhibition'.

What next?

Early vegetation clearance works are expected to start in December 2017 and will go on up to March 2018. The main works will then start in March 2018 and the scheme will be Open for Traffic in January 2020. Updates will be posted on this website and in the local communities using a variety of engagement methods including local press and through local councils in a bid to keep the community informed of progress.

Why we need this scheme

The M23 is a crucial part of the UK strategic road network connecting Crawley and Gatwick Airport to the M25 motorway, routes into London and the rest of the UK. This stretch of the M23 is heavily used by traffic travelling to and from Gatwick Airport and between Brighton and London, especially during UK holiday periods. As a result safety, congestion and journey times are all key issues that need to be improved. As junction 9 of the M23 is the main access for traffic travelling to and from Gatwick Airport, this scheme is of particular local and national economic and political importance.

Aims

With this scheme, we aim to improve:
  • safety
  • congestion
  • journey times
Learn more about how to drive on smart motorways.

The scheme in detail

The M23 junction 8 to 10 smart motorway scheme will add further road space by converting the hard shoulder to a permanent running lane with additional traffic monitoring, emergency refuge areas and variable message signs. The work will include:
  • four permanent running lanes in each direction, created by conversion of the hard shoulder
  • redefined junction layouts to accommodate the extra lane
  • 16 new gantries to carry the new variable message signs
  • 12 new emergency refuge areas
  • a hardened central reserve with a new rigid concrete barrier
  • new noise barriers where identified by environmental assessment
  • work to maintain access to the motorway from Weatherhill Depot and for traffic officers

Construction

During the construction phase of the scheme, roadworks will be needed along this section of the M23 between junctions 8 and 10. It is anticipated that narrow lanes traffic management, temporary concrete safety barriers and speed restrictions will be put in place. In addition junction layouts may be temporarily altered to allow for resurfacing and improvement. There will be temporary closures of the carriageways at night on some occasions. In these instances all updates and diversions will be clearly available and published in the appropriate section of the scheme’s webpage. Clearly signed diversions will be put in place where the work is being carried out.

Environmental impact

Highways England is committed to delivering better environmental outcomes. In remaining within current motorway boundaries, smart motorways have the built-in advantage of minimising scheme environmental footprints. In addition, we carry out thorough environmental assessments to identify and assess potential environmental impacts and recommend mitigation that can be included in the scheme to minimise them.

M23 junction 8 to 10 environmental assessment

We have considered the full range of environmental topics and found that there will be no long term significant effects. Temporary effects during construction will be slight changes in views, construction noise, disruption to road users and some loss of habitat of negligible value. A comprehensive Construction Environment Management Plan will minimise these effects. The key issues considered are:
  • air quality, noise and visual impacts in relation to nearby housing
  • the SSSI between Mole Gate and Reigate Escarpment
  • protected species and habitats including bats, badgers and great crested newts
  • the setting of conservation areas and heritage assets such as Surrey Hills Area of Outstanding Natural Beauty
  • public rights of Way

Project media files and documents

There are no images 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 M25 clockwise at junction J8 . Lane Closures : Lanes 1, 2, 3 and 4 will be closed. Reason : Horticultural works are planned. Status : Pending. Schedule : From 22:00 on 23 November 2017 to 05:00 on 28 November 2017. Lanes Closed : All lanes will be closed.
Posted: November 17, 2017, 4:50 pm
Location : The M23 northbound entry slip at junction J8 from the M25 clockwise. Reason : Horticultural works. Status : Currently Active. Period : expect disruption until 05:00 on 17 November 2017. Lanes Closed : All lanes are closed.
Posted: November 17, 2017, 4:50 pm
Location : The M25 anticlockwise between junctions J9 and J8 . Lane Closures : Lanes 1, 2 and 3 will be closed. Reason : Road repairs are planned. Status : Pending. Schedule : Expect disruption everyday between 22:00 and 05:30 from 17 November 2017 to 28 November 2017. Lanes Closed : There will be three of four lanes closed.
Posted: November 17, 2017, 4:50 pm
Location : The M23 southbound entry slip at junction J8 from the M25 clockwise. Reason : Horticultural works are planned. Status : Pending. Schedule : From 22:00 on 16 November 2017 to 05:00 on 17 November 2017. Schedule : From 23:00 on 17 November 2017 to 05:00 on 18 November 2017. Schedule : Expect disruption everyday between 22:00 and 05:00 from 20 November 2017 to 23 November 2017. Lanes Closed : All lanes will be closed.
Posted: November 17, 2017, 4:50 pm
Location : The M25 clockwise between junctions J6 and J7 . Lane Closures : Lanes 1 and 2 will be closed. Reason : Horticultural works are planned. Status : Pending. Schedule : From 23:00 on 17 November 2017 to 05:00 on 18 November 2017. Schedule : Expect disruption everyday between 22:00 and 05:00 from 20 November 2017 to 23 November 2017. Lanes Closed : There will be two of four lanes closed.
Posted: November 17, 2017, 4:50 pm
Location : The M23 southbound exit slip at junction J10 . Lane Closures : Lane one will be closed. Reason : Horticultural works are planned. Status : Pending. Schedule : Expect disruption everyday between 09:30 and 16:00 from 20 November 2017 to 24 November 2017. Lanes Closed : There will be one of two lanes closed.
Posted: November 17, 2017, 4:50 pm
Location : The M25 clockwise at junction J8 . Reason : Horticultural works. Status : Currently Active. Period : expect disruption until 05:00 on 23 November 2017. Lanes Closed : All lanes are closed.
Posted: November 17, 2017, 4:50 pm
Location : The M23 southbound between junctions J7 and J8 . Lane Closures : Lane one will be closed. Reason : Emergency roadworks are planned. Status : Pending. Schedule : From 23:00 on 17 November 2017 to 05:00 on 18 November 2017. Schedule : Expect disruption everyday between 22:00 and 05:00 from 20 November 2017 to 23 November 2017. Lanes Closed : There will be one of four lanes closed.
Posted: November 17, 2017, 4:50 pm
Location : The M23 northbound exit slip at junction J10 . Lane Closures : Lane one will be closed. Reason : Horticultural works are planned. Status : Pending. Schedule : Expect disruption everyday between 09:30 and 16:00 from 20 November 2017 to 24 November 2017. Lanes Closed : There will be one of two lanes closed.
Posted: November 17, 2017, 4:50 pm
Location : The M23 southbound between junctions J7 and J8 . Lane Closures : Lane one will be closed. Reason : Emergency roadworks are planned. Status : Pending. Schedule : From 23:00 on 17 November 2017 to 05:00 on 18 November 2017. Schedule : Expect disruption everyday between 22:00 and 05:00 from 20 November 2017 to 23 November 2017. Lanes Closed : There will be one of two lanes closed.
Posted: November 17, 2017, 4:50 pm
Location : The M25 anticlockwise between junctions J6 and J5 . Lane Closures : Lanes 1 and 2 will be closed. Reason : Emergency barrier repairs are planned. Status : Pending. Schedule : From 22:00 on 18 November 2017 to 05:00 on 19 November 2017. Lanes Closed : There will be two of four lanes closed.
Posted: November 17, 2017, 4:50 pm
Location : The M23 SPUR eastbound between junctions J9A and J9 . Lane Closures : Lanes 1 and 2 will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : From 22:00 on 17 November 2017 to 06:00 on 18 November 2017. Schedule : Expect disruption everyday between 22:00 and 06:00 from 20 November 2017 to 25 November 2017. Lanes Closed : All lanes will be closed.
Posted: November 17, 2017, 4:50 pm
Location : The M25 clockwise between junctions J7 and J8 . Lane Closures : Lanes 1 and 2 will be closed. Reason : Horticultural works are planned. Status : Pending. Schedule : From 23:00 on 17 November 2017 to 05:00 on 18 November 2017. Schedule : Expect disruption everyday between 22:00 and 05:00 from 20 November 2017 to 23 November 2017. Lanes Closed : There will be two of four lanes closed.
Posted: November 17, 2017, 4:50 pm
Location : The M25 anticlockwise entry slip at junction J7 from the M23 north. Lane Closures : Lanes 1 and 2 will be closed. Reason : Horticultural works are planned. Status : Pending. Schedule : From 22:00 on 23 November 2017 to 05:00 on 24 November 2017. Schedule : From 23:00 on 24 November 2017 to 05:00 on 25 November 2017. Schedule : From 22:00 on 27 November 2017 to 05:00 on 28 November 2017. Lanes Closed : All lanes will be closed.
Posted: November 17, 2017, 4:50 pm
Location : The M25 clockwise at junction J8 . Reason : Horticultural works. Status : Currently Active. Period : expect disruption until 05:00 on 23 November 2017. Lanes Closed : All lanes are closed.
Posted: November 17, 2017, 4:50 pm
Location : The M25 clockwise at junction J7 . Lane Closures : Lanes 1 and 2 will be closed. Reason : Horticultural works are planned. Status : Pending. Schedule : From 23:00 on 17 November 2017 to 05:00 on 18 November 2017. Schedule : Expect disruption everyday between 22:00 and 05:00 from 20 November 2017 to 23 November 2017. Lanes Closed : There will be two of three lanes closed.
Posted: November 17, 2017, 4:50 pm
Location : The M25 clockwise between junctions J8 and J9 . Lane Closures : Lanes 1, 2 and 3 will be closed. Reason : Emergency barrier repairs are planned. Status : Pending. Schedule : From 22:00 on 17 November 2017 to 05:00 on 18 November 2017. Lanes Closed : There will be three of four lanes closed.
Posted: November 17, 2017, 4:50 pm

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