UK Road Closed: National Highways

A section of the National Highways Strategic Road Network is set to be closed overnight in East Sussex, causing significant disruption for drivers on the M23 and A23. The road closure, which will take place from 7pm on 11 August 2026 to 5am on 12 August 2026, is located at National Highways Closure — 497448, approximately 3 miles north of Brighton.

The closure is necessary for maintenance work to be carried out, and drivers are advised to plan their journeys in advance to avoid the area. Motorists are being directed to use alternative routes, and National Highways is urging drivers to check traffic apps and websites for up-to-date information before embarking on their journeys.

For those travelling on the A23, drivers will be unable to proceed northbound between the junctions with the M23 and the A27. A diversion will be in place, taking drivers via the A27 and the A24. Similarly, for those travelling on the M23, drivers will be unable to proceed northbound between Junction 9 and Junction 10. Motorists will be diverted onto the A23 and directed to rejoin the M23 at Junction 10.

National Highways is working to minimise the impact of the closure and is advising drivers to check the traffic and travel information website at the time of their journey for the latest information. Motorists are also being urged to consider delaying their journeys or travelling during less busy times to avoid congestion.

In addition to the road closure, there will be lane closures on the M23 and A23 to facilitate the maintenance work. Drivers are advised to follow the signed diversions and to plan their journeys accordingly. For those who need to travel through the area, it is essential to check traffic and travel information before setting out.

The road closure and lane closures will be in place for several hours, and drivers are advised to plan their journeys accordingly. With the summer holidays in full swing, traffic volumes are likely to be high, and drivers are urged to exercise caution and patience when navigating the affected area.

For more information on the road closure and to plan your journey, visit Road Closures UK.