M4 Junctions 3 to 12 Smart Motorway

The M4 is the main strategic route between London, the West of England and Wales. It connects people, communities and businesses, carrying on average 130,000 vehicles per day and is prone to congestion.

Taylor Woodrow is working in joint venture with VINCI Construction Grands Projets and Balfour Beatty on behalf of Highways England to upgrade the road to a Smart Motorway between junction 3 at Hayes and Junction 12 at Theale.

The project aims to reduce congestion, smooth the flow of traffic and make journeys more reliable, with works including:

  • 11 new overbridges
  • 131 new gantries
  • 108 variable message signs to update drivers
  • 421km of new lower-noise surfacing on all running lanes

2020 was a big year for the Balfour Beatty VINCI joint venture, with regular weekend closures required to facilitate the demolition and rebuilding of 11 overbridges and the extension of the motorway bridge over the River Thames. Click on the project’s ‘A Year of Bridges’ film at the top of the page for a summary of this fantastic achievement. It was a busy year for the project as a whole, which has remained open throughout the COVID-19 pandemic and subsequent lockdowns to help keep infrastructure moving.

During 2021, the Balfour Beatty VINCI joint venture will begin reducing the length of the 51km scheme as sections of the motorway are completed. Junctions 8/9 to 12 will be largely completed by Spring 2021 when the traffic management will be removed, and speeds increased to up to 70mph. Work will continue between junction 3 to 8/9 through to project completion in March 2022.

Find more about planned works here.

The work is being carried out in a collaborative alliance approach between client, contractor and supply chain; with digital transformation at the heart of the project’s success.

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