Skip to main content

We are converting the A465 from Dowlais Top to Hirwaun to 2 lanes in each direction.

Under construction
Region / County:
south-east Wales
Start date:
early 2021
End date:
£590 million
First published:
28 September 2017
Last updated:


Why we are doing it

The objectives are to:

  • improve traffic flow and make it safer to overtake
  • make the road safer, especially around junctions and areas with poor visibility
  • improve access to key services, jobs and markets supporting inward investment to areas like the Ebbw Vale Enterprise Zone.

Current progress

The main work started in May 2021. 

The work has included:

  • earthworks at key locations along the entire route.
  • created new habitats for Great Crested Newts, dormice, lapwing and bats
  • moving utilities including: water, gas, electricity, telecoms, drainage at locations along the route
  • installed water management measures along the scheme
  • culverts constructed at locations along the route
  • environmental works including: planting of 1,200 trees to create new woodland near Crematorium road,
    • planting of Devil’s Bit Scabious to encourage the conservation of Butterflies, known as Marsh fritillary
    • installing over 70 bat boxes
  • installed temporary roundabouts at Dowlais to provide space for building 2 overbridges
  • closed Jones street in Pant for construction of new bridge
  • building the slip road retaining wall at Prince Charles junction
  • started work to strengthen and widen Taf Fechan viaduct
  • installed a temporary footbridge at Cefn Coed
  • piling on the south and north side of the A465 at Cefn Coed to widen the cutting for the new dual carriageway
  • piling at High street bridge at Cefn Coed before demolition of existing bridge and construction of the replacement bridge
  • constructed piers to support the new bridge at Taf Fawr
  • improvements at junction with A470 and Upper High Street
  • Nant Ffrwd eastbound slip road bridge
  • piers to support the new viaduct that will run adjacent to the existing viaduct  at Nant Hir 176

Continuing works

  • built new temporary stretch of A465 at Nant Hir towards Baverstock
  • Nant Moel underpass under construction
  • building bridges at Hirwaun west and east
  • temporary A465 introduced between Hirwaun (Trewaun) and tramway ahead of excavation works for the new carriageway
  • new drainage installed beneath Hirwaun Road
  • realigned traffic at Rhigos to allow for construction of new junction

We are working on:


    Public exhibitions: end 2015
    Publication of draft orders and environmental statement: summer 2017
    Publication of draft supplementary orders and supplementary environmental statement: early 2018
    Public local inquiry: spring 2018
    Minister's decision: early 2019
    Making of Orders: spring 2019
    Publish draft Supplementary Orders (No.1): autumn 2019
    Making Supplementary Orders (No.1): summer 2020
    Publish draft Supplementary Orders (No.2): summer 2020
    Procure contractor: autumn 2020
    Start of construction: early 2021
    Completion of new section of trunk road: mid 2025

    Next steps

    Main building works include

    • building bridges at Afon Cynon Hirwaun East, Tramway (footbridge), Vale of Neath railway, Nant Hir, Nant Ffrwd, Taff Fawr and Dowlais
    • building a new underpass at Court Farm
    • moving of ancient woodland at Croesbychan and starting to build the new Croesbychan junction
    • building new Swansea road link and the new junction at Baverstock
    • building a temporary road at the A470 to provide space for building the new road
    • strengthening and widening of Taff Fechan bridge
    • starting to build the new Prince Charles junction
    • building a new side road at Pant Industrial Estate
    • building the new westbound road between Bryniau road and Pant road to enable the construction of new bridge and retaining wall at Pant road

    What we are doing

    This road project is known as the A465 Heads of the Valleys section 5 and 6. The project will extend between Hirwaun and Dowlais Top for 11 miles (17.7km).

    It will leave the current A465 between the Hirwaun and Trewaun junctions for about a mile (1.4km) and between the Taf Fechan Viaduct and the Gurnos Farm underpass for about half a mile (0.8km).

    The new road will be a 70mph dual carriageway with 6 junctions.

    Slip roads on and off the A465 carriageway will connect the joining roads.

    How we consulted

    We consulted on improvements to the A465 between Abergavenny and Hirwaun in 1994 as part of the process to develop the preferred route for the whole project.

    We held public information exhibitions in December 2015. At these events we presented the 1990s design and highlighted areas where we are considering options to improve this design.

    We have run a series of presentations to local interest groups and meetings with local landowners, businesses and other key stakeholders. We have used these to gather information on and understand how the proposals fit with local priorities, objectives and policies.

    We held a series of draft orders exhibitions in August 2017.

    We held a public local Inquiry in April and May 2018.

    Latest announcements

    Announcements and notifications


    Reports, environmental statements and plans


    The legislation required for the project to proceed including drafts for public comment

    Help and support

    Ask a question about the project or report an issue

    To report incidents or issues 24 hours a day please contact the A465 control room phone: 0800 865 4650

    For community queries or complaints contact the public liaison officer. Croesawir galwadau yn Gymraeg / calls are welcomed in Welsh.