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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 2023
£60 million
First published:
10 September 2021
Last updated:


Why we are doing it

The A40 between St Clears and Haverfordwest is mainly a single carriageway. We want to upgrade the existing road to improve safety and to incorporate new cycling and walking routes.

Current issues are:

  • few places for overtaking slower vehicles
  • poor visibility
  • many accesses opening on to the road
  • summer traffic can increase by over 30%
  • the road splits the communities
  • the A40 runs through Llanddewi Velfrey where there is a 40mph speed limit. This means that journey times are poor. The road is dangerous for drivers as they may take bigger risks when passing slower vehicles.
  • the A40 mainline and Redstone Cross Junction is substandard

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.

What we are doing

A number of transport planning objectives have been developed iteratively during previous development work and engagement on the A40 project, aiming to address one or more of the identified problems. The Scheme objectives are:

  • to enhance network resilience and improve accessibility along the east-west transport corridor to key employment, community and tourism destinations.
  • to improve prosperity and provide better access to the county town of Haverfordwest, the Haven Enterprise Zone and the West Wales ports at Fishguard, Milford Haven and Pembroke Dock.
  • to reduce community severance and provide health and amenity benefits.
  • to reduce the number and severity of collisions
  • to improve the safety (and perceived safety) of the Redstone Cross Junction and reduce the number and severity of collisions.
  • to promote active travel by cycling, horse riding and walking to provide opportunities for healthy lifestyles.
  • to deliver a scheme that promotes social inclusion and integrates with the local transport network to better connect local communities to key transport hubs.
  • deliver a project that is sustainable in a globally responsible Wales, taking steps to reduce or offset waste and carbon.
  • give due consideration to the impact of transport on the environment and provide enhancement when practicable.

The scheme consists of:

  • new 6km highway, majority is offline to the old road
  • new roundabout to the east of Llanddewi Velfrey for access to village
  • new junction west of Llanddewi Velfrey
  • enlarged Penblewin roundabout
  • new junction at Redstone Cross
  • two overbridges for the existing roads
  • drainage and mammal underpasses
  • active travel work along the old road network

Current progress

Alun Griffiths Contractors have been appointed to do the works.

Advanced design work and ecology surveys commenced in spring 2021.

Building work will start in autumn 2021 and we are currently preparing the area for main building works. These include:

  • establishing the site offices
  • procurement of subcontractors
  • obtaining the necessary ecology approvals following the surveys
  • undertaking Ground Investigation surveys


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 2023

How we are consulting

We held two public information events for this project in autumn 2021.

Llanddewi Velfrey to Penblewin

We undertook a public consultation in 2006 as part of the process to develop the preferred route. We engaged with Pembrokeshire businesses during the 2015 study.

We held two public exhibitions in April and October 2017.

Following the publication of draft Orders in July 2019, we took a decision to hold a Public Local Inquiry, due to objections received to the draft Orders. A pre-inquiry meeting took place in January 2020.

The Public Local Inquiry was held in March 2020.

Penblewin to Redstone Cross

We held two series of public information exhibitions in April 2019.

We held a public consultation, which ran between July 2019 and September 2019.

We held a further public information exhibition in December 2019.

We held draft Orders exhibitions in August 2020 following publication of the draft orders in July 2020.

Following the publication of draft Orders in July 2020, we took a decision to hold a Public Local Inquiry, due to objections received to the draft Orders.

A Public Local Inquiry was held in November 2020.

Find out more

If you have any concerns or queries, you can contact the Public Liaison Officer on 0330 107 1504 or email:


Reports, environmental statements and plans


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