Motorists are being warned of a significant upcoming closure on the M4 to facilitate the construction of the new Badminton Road Bridge. The motorway will be completely shut in both directions between junction 18 (Bath) and junction 19 (M32) from 7pm on Friday, October 24, until 6am on Monday, October 27.
Originally scheduled for October 10-13, the closure was postponed due to a manufacturing delay affecting the steel beams required for the bridge. Sean Walsh, Route Manager for National Highways, explained that although the delay is unfortunate, the new dates ensure all materials are in place for a smooth and safe process. He added that the delay does not impact the overall project timeline.
This closure represents a crucial phase of the project, as eight steel beams will be installed across the motorway to support the new A432 Badminton Road Bridge. Following this weekend shutdown, the remaining construction work will continue with minimal disruption to traffic. The new bridge is scheduled to open in early 2026.
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The bridge itself will measure 46.5 meters long and 20 meters wide, spanning eight lanes of the motorway. Its design includes wider lanes and pavements to meet modern safety standards, with raised barriers to improve safety for pedestrians and cyclists.
With peak weekend traffic reaching 3,000 to 4,000 vehicles per hour, drivers are urged to avoid the area during the closure and plan alternative routes. A diversion route will be in place for westbound traffic, with eastbound drivers following the reverse.
The existing Badminton Road bridge, built in 1966, was found to have structural issues during an inspection in July 2023, leading to its closure. After evaluating options, replacing the bridge was deemed the most efficient and cost-effective solution to restore this important local crossing.
National Highways thanks the public for their patience and cooperation during this major infrastructure upgrade, which promises safer, more reliable journeys in the future.