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 are holding a series of public information exhibitions, where you can learn more about smart motorways, see our proposals for junctions 8 to 10 and ask the project team questions:

Date Time Location
29 Sept 2017 3pm to 9pm South Terminal Arrivals (Level 2) Gatwick Airport, West Sussex, RH6 0NP.
30 Sept 2017 10am to 5pm South Terminal Arrivals (Level 2) Gatwick Airport, West Sussex, RH6 0NP.
6 October 2017 3pm to 9pm Nutfield Lodge, Nutfield Road, Redhill, Surrey, RH1 4ED.
7 October 2017 10am to 4pm Nutfield Lodge, Nutfield Road, Redhill, Surrey, RH1 4ED.

Attendees to the exhibition at Gatwick are entitled to 2 hours free parking in the South Terminal long-stay car park. Disabled drivers should park in the short-stay and speak to the exhibition team to avoid charges.

View map highlighting the exhibition location.

For more information on travelling to and from Gatwick airport, visit their website.

What next?

Once we have worked up our proposed design we will invite you to our public information exhibitions. You will be able to learn more about smart motorways, our plans for the M23 in particular, and meet members of the project teams. We hope to do this in September 2017.

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
  • 11 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

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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 M23 northbound exit slip at junction J10 . Lane Closures : Lane two will be closed. Reason : Emergency roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 20:00 and 06:00 from 25 September 2017 to 27 September 2017. Lanes Closed : There will be one of two lanes closed.
Posted: September 22, 2017, 11:44 pm
Location : The M25 anticlockwise exit slip at junction J8 . Lane Closures : Lane one will be closed. Reason : Road repairs are planned. Status : Pending. Schedule : From 22:00 on 28 September 2017 to 05:00 on 29 September 2017. Schedule : From 22:00 on 29 September 2017 to 06:00 on 30 September 2017. Lanes Closed : There will be one of two lanes closed.
Posted: September 22, 2017, 11:44 pm
Location : The M23 southbound between junctions J10 and J11 . Lane Closures : Lane three will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 20:00 and 06:00 from 27 September 2017 to 30 September 2017. Schedule : From 20:00 on 2 October 2017 to 06:00 on 3 October 2017. Lanes Closed : There will be one of three lanes closed.
Posted: September 22, 2017, 11:44 pm
Location : The M25 anticlockwise at junction J8 . Lane Closures : Lanes 1, 2, 3 and 4 will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : From 22:00 on 26 September 2017 to 05:00 on 27 September 2017. Lanes Closed : All lanes will be closed.
Posted: September 22, 2017, 11:44 pm
Location : The M23 northbound between junctions J9 and J8 . Lane Closures : Lane one will be closed. Reason : Horticultural works are planned. Status : Pending. Schedule : Expect disruption everyday between 22:00 and 05:00 from 25 September 2017 to 29 September 2017. Schedule : From 23:00 on 29 September 2017 to 05:00 on 30 September 2017. Lanes Closed : There will be one of three lanes closed.
Posted: September 22, 2017, 11:44 pm
Location : The M25 clockwise between junctions J8 and J9 . Lane Closures : Lanes 1, 2 and 3 will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : From 22:00 on 28 September 2017 to 05:00 on 29 September 2017. Lanes Closed : There will be three of four lanes closed.
Posted: September 22, 2017, 11:44 pm

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