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Title: M4 junctions 3-12: smart motorway Post by: Cookham Webmaster on September 01, 2020, 12:30:13 PM We’re improving the M4 between junction 3 at Hayes and junction 12 at Theale by upgrading it to a smart motorway. This means there will be an additional lane for traffic which will increase capacity and reduce congestion, more technology on the road to smooth traffic flows and manage incidents and more reliable journey times.
https://highwaysengland.co.uk/our-work/south-east/m4-junctions-3-12-smart-motorway/ Start date 2018 End date 2022 Cost £848 million |