A432 Badminton Road M4 overbridge
Latest update
The bridge opened to all traffic on 20 June 2026.
Other road layouts, restrictions and repairs now that the bridge has reopened include:
Lyde Green
Road markings and signs have returned to their pre-bridge closure layout.
Local roads
Cuckoo Lane has returned to its pre-works layout. There is no entry for motor vehicles from Badminton Road, but vehicles are still able to exit onto Badminton Road.
Down Road weight limit
The 7.5-tonne weight limit will go through a formal consultation in the coming months. If approved, it will become permanent.
Westerleigh Road speed limit
The temporary reduction from 40mph to 30mph will also go through a formal consultation. If approved, this change will become permanent.
Road repairs
We are planning a programme of repairs to roads affected by diverted traffic and are in discussions with National Highways about the funding of these repairs.
Changes to public transport
The Y2 bus service (operated by First bus) has been rerouted between Yate and the M32 via the full length of Badminton Road through Coalpit Heath to Wick Wick roundabout, then along the A4174 ring road to Hambrook.
This is the same route used by the Y1 before the bridge closed in 2023.
The Y1 (operated by First bus) continues to serve Frampton Cotterell and Winterbourne.
Background
The bridge was closed on 12 July 2023 for detailed investigations after inspectors from National Highways discovered cracking and deterioration during a routine structural inspection.
Its condition meant the bridge needed replacing and had to be closed. Work began to prepare for the bridge replacement in January 2024.
National Highways were responsible for the bridge, the investigations and the replacement project. Read more on the National Highways website.
We supported the project in managing traffic impact on local roads and communicating with local people affected by the A432 closure and diversions.
The new bridge was designed to provide better pedestrian and cycling facilities, wider shared footways and higher parapets.
National Highways project timetable
- December 2023 to March 2025 – bridge design
- February 2024 to August 2024 – ground investigation
- October 2024 to February 2025 – utilities removal and culverting under the M4
- March 2025 – demolition of existing bridge
- April 2025 to spring 2026 – construction of the new bridge
Past updates
April 2026
National Highways have announced they will open the bridge to non-motorised traffic on the afternoon of 19 June, and from 7am on 20 June to all traffic. Read the latest update from National Highways.
December 2025
Following the installation of the metal framework for the new bridge in October, National Highways are now completing the foundations and surfacing ready to open the bridge in spring 2026.
Watch this video to hear the latest update:
October 2025
National Highways put the metal framework in for the new bridge.
September 2025
National Highways have made good progress on final preparations to install the new bridge. They are aiming to lift the new structure into place the weekend of Friday 24 to Monday 27 October.
It will mean the full closure of the motorway for the weekend between junction 18 (Bath) and junction 19 (M32). A fully signposted diversion route will be in place.
March 2025
National Highways demolished the bridge between Friday 21 and Monday 24 March and will now start to prepare for construction of the new bridge.
Pedestrians and cyclists are diverted via Down Road, Bury Hill and Church Lane.
A432/M4 overbridge
February 2025
The demolition of the old bridge is provisionally scheduled for the weekend of 21 to 24 March 2025. We will update this page once the date is confirmed.
Watch this video to hear about the plans:
November 2024
Our highways team has made changes to the diversion routes to improve safety and the flow of traffic. These include new road signs, road markings, speed limits and weight restrictions.
October 2024
The M4 was closed in both directions between junctions 18 to 19 from 18 to 21 October to allow National Highways to divert the utilities in the bridge under the motorway.