The closure will affect both directions of the motorway, requiring a well-planned diversion route to manage the traffic flow.
The new bridge, consisting of 68 beams, each weighing 16 tonnes, and another four beams weighing 40 tonnes, will be installed as part of ongoing work to make journeys safer and reduce pollution. The previous closure in May saw identical work being carried out on the eastern gyratory.
Motorists travelling from Junction 10 to Junction 11 will be redirected northbound on the A3 to Painshill Junction, then onto the A245 towards Woking, and finally, the A320 to rejoin the M25 at Junction 11.
In the opposite direction, from Junction 11 to Junction 10, the diversion will guide drivers southbound on the A320 towards Woking, onto the A245 towards Byfleet and Painshill Junction, and then southbound on the A3 back to Junction 10.
To alleviate potential delays, drivers should consider using the M25 via the Dartford Crossing as an alternative route, which may prove quicker.
National Highways urges all motorists to plan their journeys ahead of time, follow the posted diversion signs, and allow for extra travel time. The organisation appreciates the public’s understanding and cooperation as this crucial infrastructure improvement is carried out to enhance road safety and traffic flow.