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We’re carrying out resurfacing on the M4 between junctions 17 and 19. Start date Summer 2024 End date Winter 2024 Cost TBC Latest updates Overview Documents Latest updates 20 March 2025 Resurfacing works complete Repairs and maintenance of our motorways are critical for safety reasons. As part of our routine maintenance programme, we’ve resurfaced the M4 between junctions 17 and 19. We completed works on 19 January 2025, including: resurfacing over 31km of lanes painting more than …

We have completed a study to consider whether there is an alternative key north-south route between the Dorset coast and the M4. The aim of the study was to identify which corridor(s) could provide the main route and potential enhancements. Overview Documents We have produced a brochure which details the work carried out through the study and what we found. The Department for Transport are now considering these findings and recommendations and will set out how to reflect these in future Road…

We’re resurfacing a section of the M4 Prince of Wales bridge to extend the life of the road surface, providing smoother and safer journeys for motorists. Start date Summer 2024 End date Autumn 2025 Cost TBC Latest updates Overview Documents Latest updates 15 July 2025 Westbound resurfacing works complete We've completed our works on the M4 Prince of Wales bridge and all traffic management has been removed.  All lanes on both carriageways are back open with a 70mph speed limit.  We've…

We need to resurface M4 eastbound carriageway between junction 13 Chieveley Interchange and junction 12 Theale Interchange, near Reading, West Berkshire. Start date 2 June 2025 End date September 2025 Cost Approximately £5.9 million Latest updates Overview Documents Latest updates 08 September 2025 M4 junction 12 to 13 resurfacing - 8 September to 10 October Works Monday 8 September until Friday 10 October (9pm-6am) The M4 will be closed at night westbound between junction 12 (Theale…

We’ve made improvements on the M4 between junctions 3 and 12 by adding an additional lane for traffic to help increase capacity and reduce congestion. We’ve also put in place new technology to smooth traffic flows and manage incidents along this stretch. Start date 2018 End date 2022 Cost £848 million Latest updates Overview Documents Latest updates 05 December 2022 Upgraded motorway between junctions 3 and 8/9 now open The national speed limit has been restored between junctions 4 and…

The elevated section of the M4 spans the A4 Great West Road in Brentford. It carries tens-of-thousands of journeys in and out of west London every day and helps keep motorway traffic separate from local roads. As part of our commitment to making sure this important viaduct remains safe and maintained, we’re repairing some of the reinforced concrete pillars which support the structure from the A4 Great West Road’s central reservation. We’ll need to continue this work periodically over the coming …

M4 to Dorset Coast: Strategic connectivity study December 2023 M4 to Dorset Coast - Strategic connectivity study Introduction National Highways is the government organisation which plans, designs, builds, RIS2 identified the need operates and maintains England’s motorways and major A-roads, known as the strategic road for an M4 to Dorset network (SRN). The roads we manage play a Coast study as follows: critical role in enabling businesses to transport products and services, providing access to j…

Back Published 25 September 2024 Press Release National Highways is warning road users that the M4 north of Bristol will be closed for a full weekend in October as part of the work on the A432 Badminton Road Bridge. The M4 will be closed in both directions between junctions 18 and 19 from 7pm Friday 18 October to 6am Monday 21 October while a trench is dug under the motorway. This will allow utilities to be diverted that are currently within the bridge before the structure is demolished nex…

M4 Junction 18 to 19 road closure diversion route Hambrook Siston Dyrham Warmley Bristol Wick Road Closure Road Diversion CRE25 0532 © Crown copyright and database rights 2025 OS AC0000827444

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