Minister for Environment Sue Essex unveiled a plaque on Wednesday to mark the completion of the £6.4m. A477 Sageston - Redberth bypass which is now open to traffic.
Welcoming the opening of the Welsh Assembly Government- funded 5.6km bypass, Ms. Essex said: "The completion of this scheme is particularly significant as the A477 is part of the core trunk road network and provides an important link between the national motorway network and the port of Pembroke Dock. It will also provide much needed relief for the communities of Redberth and Sageston."
The new road has been designed in a way that is sensitive to the environment and incorporates a broad range of mitigation measures. Thin surfacing, which produces less tyre noise than more conventional materials, has been used throughout the scheme. This, coupled with the removal of through traffic from the villages of Sageston and Redberth, will improve the environment for local residents.
Pembrokeshire County Councillor Brian Hall, who is Cabinet member with responsibility for Environment and Transportation, said the Authority welcomed the opening of the by-pass as an important step in the upgrading of the A477.
"The County Council has long maintained that better road and rail links are vital for the future prosperity of Pembrokeshire," he said.
"We are now hoping that the Fingerpost to Bangeston stretch of road a few miles outside Pembroke Dock will receive similar treatment.
"This section of the southern corridor highway to Ireland is one of the last pieces of the A4777 jigsaw which desperately requires upgrading."