Sisk / Roadbridge Joint Venture (SRB) completed £68m of improvements on the section of the A477 between St Clears and Red Roses, which the Transport Minister Edwina Hart has described as a "vital" part of the trans-European road network.
Mrs Hart said the road is "another example" of the Welsh Government's commitment to improving Wales' transport infrastructure, which is "critical" to improving the country's economic competitiveness.
“I am very pleased to be able to open this important new road. As well as being part of a vital trans-European road network, this improved section of the A477 will provide more efficient road connections to the important tourism and energy enterprises in Pembrokeshire, and enable more effective connections with Ireland via Pembroke Dock.
“This project also brings many other benefits to road users and local people by improving road safety, creating bypasses for Llanddowror and Red Roses and providing new walking and cycling routes..
“Improving our transport infrastructure is critical to improving Wales' economic competitiveness and this new road is another example of the Welsh Government's commitment to that aim. I congratulate everyone involved on the delivery of this improvement project, which I am sure will be appreciated by many in years to come