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News of roadworks affecting the M23 to Crawley

The Highways Agency will be carrying out bridge improvement works between junctions 8 & 9 of the M23 which may cause some minor disruption to road journeys starting from Monday15 September. Click here to see a map of the proposed diversion.

The work will take place on one carriageway at a time to ensure it can be carried out as quickly as possible and two lanes will remain open to traffic in each direction with a free recovery service provided to minimise disruption.

Why does the Highways Agency want to do this work?
The existing bridge joint on the M23 Coopers Hill Viaduct was inspected and found to be severely corroded. It needs to be replaced to prevent it breaking. This will ensure that the need for emergency closures is minimised and this section of road remains open as much as possible

What is the Highways Agency planning to do?
The Highways Agency will be replacing the existing bridge joint on the M23 Coopers Hill Viaduct which takes the M23 over the Coopers Hill Road south of the M23 between junctions 8 and 9 in Surrey. The existing joint will be removed and a new joint cast into the viaduct. The Highways Agency will be making use of the closures to complete general maintenance such as litter picking and gulley cleaning.

When will work start and how long will it take?
Preparation work will start from Monday 15 September for 10 weeks. Traffic Management will be implemented to allow for the removal of the central reserve safety barriers in preparation for the contraflow system.

The London-bound carriageway will be closed between junctions 8 and 9 with road users using the southbound carriageway in contraflow with two lanes open in each direction and this will be in place for three weeks.
The contraflow system will then be changed, closing the southbound carriageway between junctions 9 & 8 with road users using the London-bound carriageway with two lanes open in each direction.
The contraflow system will be in place 24 hours a day and is due to be in place for six weeks, three weeks on the London-bound carriageway and three weeks on the southbound carriageway.

How will the Highways Agency carry out this work and how will it affect you?
In order to carry out the preparation work there will be overnight lane closures on both carriageways from Monday 15 September. This is to allow the Highways Agency to implement the first phase of the traffic management, commencing 22 September. Traffic will be using the hardshoulder with a 50mph speed limit. This will allow three lanes to remain open in both directions whilst the Highways Agency carries out the preparation work to create the crossover points for the contraflow system. 
Once this is complete, the contraflow system will be in operation 24 hours a day with a 50mph speed limit on the approach and a 40mph speed limit in place throughout the contraflow. Narrow lanes will also be in place.
At peak times whilst the contra flow is in place, delays are likely and you may wish to consider alternative methods of transport at this time.

Diversion Routes
During the overnight closures of the M23 between junctions 8 and 9 whilst the Highways Agency carries out final preparations and change and remove the contraflow system, road users will follow a diversion route via the M25, A22 and A264. One carriageway will be closed at a time.

Work of this nature does generate disruption, and the Highways Agency says it has made every effort to ensure that delays are kept to a minimum but would urge road users to allow extra time and plan their journeys. 

In deciding on the programme of works, the Highways Agency has considered the delivery timescales for the scheme, impact on the local community whilst the works are being carried out and the safety of the operatives. Considerations such as health & safety, residents' welfare, emergency services, environmental impacts, business continuity, commercial affects and duration of works have been taken into account..

How you can get in contact:
If you have any queries about the works or want to discuss them further, please do not hesitate to contact the Highways Agency Customer Care Line on 0845 6000414, or write to us at either or Highways Agency, c/o Balfour Beatty Mott MacDonald, 10 Kings Hill Avenue, Kings Hill, Kent, ME19 4AR.

Public Information Event
We will be holding a public information event regarding the forthcoming M23 Coopers Hill Viaduct works.

Thursday 4th September
5.30 till 7pm

Sofitel Hotel
Gatwick Airport,
West Sussex,

Representatives from the Highways Agency and their contractors will be available to answer questions about the scheme and the associated works.

Project Reference: P7688

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