M3 J9 improvements: major milestone and environmental progress
Updates on the successful demolition of the old southern bridge.
Published: 11 November 2026
Another significant milestone for the M3 Junction 9 Improvements project, following the successful demolition of the old southern bridge over the M3.
Download The demolition (MP4, 3 MB)
The demolition took place during the planned weekend closure from 6 to 9 November, when the M3 was closed in both directions between junctions 8 and 9 to provide a safe working area for the demolition team and road users. The old bridge structure and supports were no longer required following the successful switch of traffic onto the new junction layout.
Alongside this major engineering achievement, we have also been progressing our environmental work, including drone seeding to support the establishment of chalk grassland across the project.
Using drone technology provides an innovative way of delivering seeding across areas of the site, complementing the project’s wider commitment to protecting and enhancing the local environment.
Successfully delivering these activities highlights the extent of work taking place at M3 Junction 9, from removing major pieces of existing infrastructure to creating the landscape and habitats that will form part of the project’s long-term legacy.
A huge thank you to our local communities, stakeholders and road users for their continued patience and support as we make further progress.
Thank you
Kind regards
Kathryn Boyce
Customer and Communications Manager
Working in partnership with National Highways
National Highways customer contact centre
0300 123 5000