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.”

For more information on companies in this article

Related Content

  • ITS benefits escape public
    June 8, 2015
    John Kendall considers the public’s awareness of the benefits of ITS. While the results of developing ITS technology may be clear to readers of ITS International, there is far less evidence that drivers have any appreciation of what the technology is doing for them. So how aware are drivers of the developments that are designed to make their journeys less congested and safer?
  • The case for tolling the Interstates
    April 20, 2012
    Speaking at an event organised by the IBTTA last week to an audience of federal and state transportation officials, policy experts, financial analysts, and representatives from engineering firms, technology companies, and transportation facility operators, Ed Regan of Wilbur Smith Associates articulated a clear case for giving states flexibility to toll existing interstate highways.
  • Diverse development of tolling business models
    April 25, 2013
    A diversity of tolling business models offers a wider toolbox of highway finance options, as the IBTTA’s Patrick Jones explains. The business models for America’s tolled highways have gone through several different evolutions over the last 75 years, reflecting a succession of shifts in transportation policy and politics, financing and funding models, urban patterns, customer needs, and technology. And with more and more decision-makers expressing renewed interest in tolling, it’s that very diversity that ma
  • Open road tolling: safer with less congestion
    January 30, 2012
    Michael J. Davis of PBS&J looks at the positive effect that open road tolling can have on safety