Drivers warned of M3 closure in Surrey as much-anticipated footbridge to be installed
Drivers are being warned to plan their journeys this weekend when part of the M3 will close to allow a much-anticipated footbridge to be installed.
The previous Bagshot Heath footbridge, which crossed the motorway between junction 3 (Lightwater) and junction 4 (Frimley), was demolished in 2023 after engineers found issues with its ability to withstand crash impact from over height vehicles.
This weekend, a replacement structure – which weighs nearly 100 tonnes, is 63m long and 4m wide - will be lifted into place after months of careful construction in a British factory.
To do so safely, the motorway will be closed for the whole weekend – with the southbound entry slip roads closing at 12pm on Friday July 11 before the whole northbound carriageways shuts at 7pm and the southbound at 9pm.
The motorway will then reopen in both directions by 6am on Monday July 14.
The structure was originally due to be installed in April, but the work had to be delayed due to the concrete in one of the bridge abutments not hardening as expected.
The concrete has since passed subsequent tests and therefore is now safe to install.
Once the bridge is in place, contractors will need to fit mesh and anti-climb measures before it can be used by the public.
This work will be carried out during a series of overnight closures on the M3, before the footbridge is formally opened for use later in the summer.
National Highways project manager Nick Axford said: “We know how important this footbridge is to the community, and how disappointed people were when we had to postpone its installation, so we’re delighted to be taking a huge step towards opening it once again.
“Putting the bridge together has required sourcing several bespoke parts, which often take months to manufacture.
“For the installation to be carried out safely, we need to close this section of the motorway across the weekend.
“We acknowledge there may be some disruption as a result, but we are grateful to drivers for their patience and urge them to plan their journeys in advance.”
The lack of a footbridge since 2023 has forced walkers, ramblers and other pedestrians into a frustrating 1.7-mile detour to get to and from Bagshot and Lighwater Country Park.
During the closure, drivers heading northbound should leave the M3 at junction 4, follow the A331 north, then the A30 heading east and the A322 heading south, before rejoining the M3 at junction 3.
Those travelling southbound should follow the same diversion route in reverse.
Notes to Editors
National Highways is the wholly government-owned company responsible for modernising, maintaining and operating England’s motorways and major A roads.
Real-time traffic information for England’s motorways and major A roads is available via the Traffic England website, local and national radio travel bulletins, electronic road signs and mobile apps. Local Twitter services are also available.
For further information please contact National Highways' press office (24hrs) on 0844 693 1448 and select the most appropriate option:
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