Skip to main content

Highways Agency plans to increase capacity of M4

The UK Highways Agency is holding a series of public exhibitions to inform road users, local residents and businesses about proposals to transform the M4 into one of the longest stretches of ‘smart motorway’ in England by 2021. The improvement, on a 32-mile stretch between junction 3 at Hayes in London, and junction 12 at Theale in Berkshire, would increase capacity, improve journey reliability and maintain safety. The proposals are part of the Government’s investment into England’s motorways and majo
March 19, 2014 Read time: 2 mins
The 1841 UK Highways Agency is holding a series of public exhibitions to inform road users, local residents and businesses about proposals to transform the M4 into one of the longest stretches of ‘smart motorway’ in England by 2021.

The improvement, on a 32-mile stretch between junction 3 at Hayes in London, and junction 12 at Theale in Berkshire, would increase capacity, improve journey reliability and maintain safety.

The proposals are part of the Government’s investment into England’s motorways and major A-roads, which will see up to US$6.7 billion a year pumped into improving the roads by 2021, underpinning economic growth and high quality jobs across the region.

As part of the proposals, there would be 64 miles of new traffic lane taken from the existing hard shoulder, increasing capacity.   The initial scheme design also includes 131 new gantries, with 32 existing gantries remaining, while eleven bridges would be rebuilt to provide space for the additional traffic lane and provide safe journeys over the M4 for decades to come. In addition, 32 refuge bays are proposed alongside the carriageway for use by drivers in an emergency.

Subject to gaining consent, construction would be carefully planned to be carried out in phases from 2016.

Lynne Stinson, Highways Agency project manager said: “The M4 is an important corridor in and out of London for those who live and work in Buckinghamshire and Berkshire, as well as those further afield in the South West and Wales, with around 130,000 vehicles using this stretch every day.

“Based on proven benefits elsewhere, we have produced outline proposals that would see 32 miles of the M4 transformed into a ‘smart motorway’; we’re planning extra capacity by converting the hard shoulder into an additional traffic lane and introducing variable mandatory speed limits displayed overhead to help smooth the flow of traffic and reduce congestion, and to provide traffic information, with safety bays in place to maintain safety.”

Related Content

  • January 28, 2015
    TfL cycle superhighways plans will still disrupt traffic, says FTA
    The Mayor of London, Boris Johnson, has set out final plans for the construction of Europe’s longest substantially-segregated urban cycleways, the centrepiece of his US$1.3 billion commitment to get more Londoners on their bikes. Subject to approval by Transport for London, construction of the routes will begin in March. Two continuous cycle routes, almost completely separated from traffic, will cross central London from east to west and north to south, opening up thousands of new journey opportunit
  • June 19, 2014
    Manchester orbital route to become ‘smart motorway’
    Four companies, Balfour Beatty, together with Costain, Carillion and a BAM Nuttall Morgan Sindall joint venture, have been awarded the contract to upgrade a 17 mile stretch of the M60 and M62 to a ‘smart motorway’. The US$313 million upgrade, for the UK Highways Agency, aims to increase capacity, reduce congestion and shorten journey times for motorists. The M60 between junctions 8 and 12 will be upgraded to a controlled motorway with traffic flows managed by technology interventions responsive to the
  • May 9, 2014
    Motorists worried about safety on smart motorways
    The UK’s Institute of Advanced Motorists (IAM) is calling for more information and advice on smart motorways for drivers. The call comes after seventy-one per cent of drivers said they would feel less safe on a motorway with no hard shoulder than a motorway with one, according to the latest poll by the IAM.
  • July 4, 2017
    Drivers are avoiding hard shoulders converted to running lanes
    Two fifths (38 per cent) of UK drivers say they will not drive in lane one of a smart motorway where the hard shoulder has been permanently converted into a running lane, according to a survey of more than 18,000 drivers conducted by the AA.