M42 junction 4-7 safety barrier upgrade

Enhancing safety on this vital West Midlands route.

Latest updates

  • 20 December 2023

    Essential safety upgrades in 2024

    We’re continuing to deliver important safety upgrades on the central reserve barriers on the M42 which includes replacing the existing steel one with a stronger and more efficient concrete barrier, as well as installing new CCTV and roadside signage. This work – which is set to be complete by autumn 2024 – is being carried out on the M42 between junctions 4 and 7.

    Work will begin in early 2024 with some closures in place to allow for the safe installation of traffic management, to ensure the safety of all road users and our construction team.

    To offer additional safety and assurance, those lanes are covered by CCTV and will operate at 50mph. We’ll also have a free recovery service in place for vehicles that have broken down within our roadworks.

    Upcoming night time (between 9pm and 6am) closures:



    Closure & Diversion Route

    18-20 January 2024

    M42 J4-J5 northbound

    Lane closures

    30 January 2024 M42 J4-J5 northbound Lane 1 and 2 closures

    M42 J5-J4 southbound

    Please note: these closures may be amended due to poor weather or operational reasons.

Project information


We'll be carrying out safety enhancement work including:

  • upgrading the central reservation barrier with a new reinforced concrete barrier to provide better safety
  • installing new drainage infrastructure in the central reservation
  • replacing central reservation lighting where applicable
  • installing new CCTV and signage in the motorway verge

Concrete barriers significantly reduce the risk of vehicles crossing over from one carriageway to another.

They improve safety by reducing the duration of incident-related congestion. As they are virtually maintenance-free, lasting twice as long as the current ones, future requirements for closures for routine repairs will be greatly reduced.

They are part of National Highways’ ongoing work to improve safety, maintain traffic flow and offer road user assurance.


Traffic information

Information about scheduled roadworks and events on our motorways and major roads.

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