Cobham Road bridge repairs over M25
We're maintaining the bridge carrying Cobham Road over the M25 between Cobham and Leatherhead in Surrey. We’ll need to close the bridge over two weekends in 2025 while we work.
Latest updates
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26 June 2025
Our first full weekend closures is 27 - 30 June
We'll start our first full weekend closure at 9pm Friday 27 June and lift it by 6am Monday 30 June 2025
We need this to re-waterproof the bridge and replace an 18-year-old bridge joint.
Access to all nearby properties and businesses on both sides of the Cobham Road bridge will remain available. However, you won't be able to drive across the bridge during the works.
Map of Cobham Road closed section.
Diversion
When the Cobham Road bridge is closed, directly above the M25, there will be fully signed diversion routes via Leatherhead.
Southbound traffic (from the Cobham direction), will be diverted via:
- the A245 Woodlands Lane
- Woodlands Road
- Randalls Road eastbound
- Bull Hill southbound
- Station Road westbound
- B2122 Waterway Road
- Guilford Road southbound
- Cobham Road westbound.
Northbound traffic (from the Fetcham direction), will be diverted via:
- Cobham Road eastbound
- the B2122 Guildford Road
- Waterway Road northbound
- A245 Station Road westbound
- Station Approach northbound
- Randalls Road
- Woodlands Road
- Woodlands Lane westbound
Cobham Road bridge maintenance diversion route map.
Please note that there is a railway bridge on our diversion route with a 3.7 metre (12’-3”) height restriction. This bridge is located on Cobham Road between Shamrock Close and River Lane in Fetcham. We encourage drivers of high-sided vehicles to plan ahead and seek alternative routes if necessary.
We’re working closely with both major and local roadworks to ensure our closures and diversion routes are coordinated effectively.
Please remember that closures can change at short notice. You can check the latest information on our daily closures page or find live travel information on our Traffic England. Our travel alerts give details of live incidents on our network.
We'll need a second weekend closure of the bridge later in 2025. We'll give more details closer to the time.
Please also look out for temporary signs which will provide advance notice of scheduled closures.
Project information
Documents
