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We are making improvements to the road between Llanddewi Velfrey, Penblewin and Redstone Cross.

Under construction
Region / County:
Pembrokeshire, South West Wales
Start date:
summer 2021
End date:
autumn 2024
£60 million (including £45 million EU funding)
First published:
10 September 2021
Last updated:


For latest traffic updates visit Traffic Wales.

What we are doing

We are upgrading the A40 between St Clears and Haverfordwest to improve safety and incorporate new cycling and walking routes.  

This will include: 

  • a new ‘2 plus 1’ road, with more places to overtake safely 
  • a new roundabout to the east of Llanddewi Velfrey, to access the village 
  • a new junction west of Llanddewi Velfrey 
  • improving Penblewin roundabout 
  • a new junction at Redstone Cross 
  • two new overbridges, at Redstone Road and Llanfallteg Road 
  • improved drainage 
  • building mammal underpasses, to support the local ecosystem 
  • creating new cycle and footpaths to support active travel

Temporary road closures will take place throughout the building process. For the latest information, visit the Traffic Wales website.

We appreciate your support and patience as we continue to make progress on this important project. 

Current progress

We have:

  • completed the majority of the bulk earthworks 
  • built the new Penblewin Roundabout, with only finishing works remaining 
  • surfaced over 6km (3.7 miles) of road 
  • built the new Redstone Road Bridge, which is now open to traffic
  • built culverts, and underpasses
  • installed traffic sign bases and safety barriers 
  • planted thousands of trees


Public local inquiries: spring and autumn 2020 
Orders made for the scheme: March 2021 
Procurement of contractor: autumn 2020 to summer 2021 
Construction starts: summer 2021 
Construction ends: autumn 2024 

Why we are doing it

Current issues are:

  • poor visibility at Redstone Cross 
  • few places for overtaking slower vehicles 
  • poor journey times 
  • summer traffic can increase by over 30% 
  • the A40 mainline and Redstone Cross Junction is substandard 
  • the road splits the community of Llanddewi Velfrey 
  • several accesses open onto the road 

We want to: 

  • make Redstone Cross junction safer 
  • reduce the number and severity of collisions 
  • provide more safe places to overtake 
  • reduce journey times 
  • improve access to the Haven Enterprise Zone, ports at Fishguard, Milford Haven and Pembroke Dock, and the county town of Haverfordwest 
  • make it easier to access jobs, community resources and tourist attractions 
  • reduce traffic and pollution in Llanddewi Velfrey 
  • make it easier for people living in Llanddewi Velfrey to get around the village 
  • make it easier to travel by bike, horseback and on foot 

We identified in the A40 West of St Clears study that there was a need for this scheme. We revisited and updated the study in 2015 to confirm that we should go ahead with this project. 

We want to deliver a project that is sustainable and take steps to reduce or offset waste and carbon. 

How we are consulting

Llanfallteg Road:

  • Public drop-in sessions at Llanddewi Velfrey and Llanfallteg village halls in January 2024 

Redstone Cross:

  • Community engagement event at Bloomfield Community Centre in February 2024 

Llanddewi Velfrey to Penblewin: 

  • Public consultation in 2006 while developing preferred route
  • Engagement with Pembrokeshire businesses in 2015 
  • Public exhibitions in April and October 2017 
  • Pre-inquiry meeting in January 2020 
  • Public local inquiry in March 2020. 

Penblewin to Redstone Cross: 

  • Public information exhibitions in April 2019
  • Public consultation between July and September 2019
  • Further public information exhibition in December 2019
  • Exhibition in August 2020, following publication of draft orders 
  • Public local inquiry in November 2020.
European Regional Development Fund logo


Consultations are one of the ways we get feedback on a project


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

If you have any concerns or queries, you can contact the public liaison officer on 0330 041 2184. Croesawir galwadau yn Gymraeg / calls are welcomed in Welsh, or email:

Alun Griffiths has a permanent on-site office at: Parc-Y-Delyn, SA67 7PA located west of Llanddewi Velfrey village.