DRIVERS are being warned of overnight motorway closures as major improvement work continues.
Sections of the M6 will be shut at Thelwall Viaduct from today, Monday, to October 11 to allow National Highways to install a new traffic management layout as part of a long-term maintenance scheme.
Closures will take place between junctions 20 for Lymm and 21 for Woolston in both directions, with full northbound closures on September 28 and 29, and a southbound closure on September 30 and October 1.
A further northbound closure is scheduled for October 11, and all closures will be in effect from 10pm to 5am.
A National Highways spokesman said: "Thank you for your patience while we carry out these important works to help to keep motorists moving safely and reliably."
During the closures, drivers are advised to follow the signed diversion route via the M56, M60, and M62.
Following these initial works, a 24/7 contraflow system will be introduced from October 12, 2026, running until winter 2027/28.
Traffic will be limited to 40mph through this section for the duration of the scheme.
The contraflow will maintain four lanes of traffic in both directions during the day, using part of the southbound carriageway for northbound vehicles.
At night, the northbound carriageway will be reduced to a single lane, while four lanes will remain open southbound.
The long-term maintenance project will replace bridge joints on the Thelwall Viaduct to improve safety and reduce the risk of unexpected closures.
The scheme will be delivered in five stages, beginning with the northbound contraflow and scaffolding installation in September 2026.
This will be followed by joint replacement works, a switch to a southbound contraflow in spring 2027, and resurfacing and road marking in winter 2027/28.
National Highways has warned that additional traffic management may be required as the project progresses.
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