We will undertake the next Traffic Management (TM ) closure.
Night work will be undertaken between the hours of 20:00hrs – 06:00hrs on the following dates:
20th, 21st and 22nd June 2022.
Diversion Route North

Diversion Route South

Client: Welsh Government
Scheme Objectives
• 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 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.
To learn more, visit the Welsh Government website
Scheme by numbers
• 2 new roundabouts and 2 new junctions.
• 6km of new carriageway.
• 2 new bridges, 18 new culverts and 3 extensions to existing culverts.
• 5.5km of shared use facilities for walking, cycling and horse riding.
• 9 sustainable drainage ponds.
• 14.5km of highway drainage and associated pipework.
• 16km of ecological fencing.
Traffic Management
Cylchlythyr / Project Bulletin 1 – Yr Haf / Summer 2021
Cylchlythyr/ Project Bulletin 2 – Y Gaeaf / Winter 2021
Cylchlythyr / Project Bulletin 3 – Y Qwanwyn / Spring 2022
Cylchlythyr/ Project Bulletin 4 – Y Gaeaf / Winter 2022
Project Bulletin 5 – Spring 2023
Project Bulletin 6 – Summer 2023
Tanysgrifiwch i’n Cylchlythyr / Newsletter Email Subscription
Please click on the project bulletins tab for our latest newsletter.
It’s been a busy summer for the A40 team in Pembrokeshire, not only with massive achievements in construction, but with community engagement activities.
Being collaborative is one of our key values in Griffiths, and Andrew Davies, Project Manager for the Llanddewi Velfrey to Redstone Cross Improvements Scheme, along with the project’s Stakeholder Manager Adam Bateman have had the privilege of hosting several community groups on site throughout the summer.
Delegates from Cyfoeth Naturiol Cymru / Natural Resources Wales attended an educational event organised by our newly appointed NRW Framework Manager Daniel Ironmonger to review the use of Corrugated Steel Buried Structures (CSBS). This was an opportunity to see first-hand their durability and benefits including the significant carbon savings of using CSBS over more traditional alternatives.
The team then hosted an Institution of Civil Engineers (ICE) evening networking event and site visit at the A40 Improvements Project in Llanddewi Velfrey, Pembrokeshire. ICE members from West Wales and Swansea attended to view first-hand progress on the project and to learn more about some of the engineering challenges and the impressive work currently underway.
Having previously enjoyed an evening presentation in Narberth a number of months back, The Whitland and Narberth Rotary Club then enjoyed an evening visit to site to see the latest updates on progress to the project, where they had the opportunity to be driven through the working area which hidden away from the current road and is not visible to the public.
Towards the end of the summer months, the team were pleased to embrace the opportunity to host North and Mid Wales Trunk Road Agent (NMWTRA) representatives, who made the trip down to Pembrokeshire to spend a day with our project team.
Stakeholder Manager for the Scheme added “We were grateful for their time and enjoyed discussing the scheme in depth whilst touring the breadth of the 6km project, answering some really good questions and taking onboard feedback”.
(Asset International Structures (A Division of Hill & Smith Infrastructure Ltd)
The A40 Llanddewi Velfrey to Redstone Cross Improvements team at Llanddewi Velfrey successfully reached a significant milestone at 5am on Monday 19th June.
After extensive planning and preparation, the construction team led by the Principal Contractor Alun Griffiths were able to successfully construct the new online section which included a significant increase in levels between the now old section of the A40 and part of the new A40 at Ffynnon Woods, located west of Llanddewi Velfrey.
To facilitate this, the A40 was temporarily closed between 8pm on Friday 16th June 2023 and 5am Monday 19th June 2023.
This milestone is a significant step for the Scheme, which is jointly funded by Welsh Government with support from European Regional Development Fund (ERDF). These works ere strategically scheduled during a weekend and outside of school holidays to minimise disruption to local businesses and the community. Effective collaboration with a wide range of stakeholders was key to the success of this endeavor.
Andrew Davies, Project Manager added:
“A significant online section has now connected west of Llanddewi Velfrey thanks to amazing collaboration between various organisations and a very committed team working around the clock in shifts during a continuous 57 hour operation to get the job completed safely and on time. Everyone involved should very proud of their hard work and of their achievement, and we hope the users will understand this significant milestone, with it being the first section of the new road.”
In order to maintain uninterrupted emergency services, a nearby side road was temporarily closed and carefully managed to provide an alternative route around the affected area. The emergency services utilised this route effectively throughout the weekend.
Andrew also added:
“I would also like to thank the local communities affected by these works and the residents in North Pembrokeshire for showing such great understanding whilst we closed the A40 to complete this challenging task.”
Looking ahead, construction work will proceed rapidly during the summer months, primarily taking place off-line and at a distance from the current A40.
Please contact the team if you would like to view any drawings relating to this Scheme.
You can contact the project’s Community Liaison Officer on 0330 107 1504*
*Calls to this number are charged at national call rates and included in inclusive minute plans from landlines and mobiles
If the PLO is unable to answer your call, please leave a message and someone will come back to you as soon as possible. Alternatively, please complete the form below where your enquiry will be dealt with.
*Calls to this number are charged at national call rates and included in inclusive minute plans from landlines and mobiles