Improvements to the A40 between Penblewin Roundabout and Redstone Cross will cost £20 million it has been revealed.
Ken Skates, Welsh Government Economy and Transport Minister, has confirmed the preferred route - Option 2B would be built at an estimated cost of £20m.
Construction could begin in 2021, subject to gaining the necessary statutory consents.
It would provide additional A40 overtaking provision in both east and west directions, with a modern ‘2+1’ lane configuration.
It would also incorporate the provision of an overbridge on the B4313, which would maintain north-south local connectivity and improve safety.
A new shared cyclist and pedestrian facility is being explored in order to encourage active travel.
The decision follows an eight-week public consultation exercise from July to September this year, during which Option 2B received the most support.
“In making this decision we have listened carefully to local residents and believe the proposed improvements would deliver real benefits for them,” said Mr. Skates.
“The proposals would provide greater resilience, enhance journey time reliability, and improve safety.
“The preliminary design, which considers the environmental and engineering issues in more detail, continues to be developed and I would encourage interested parties to continue to be involved.”
Local residents will be able to find out more about the scheme at a public information exhibition on Monday (December 16) being held at Queens Hall, Narberth, running from 12 to 8 pm.
Further information about the scheme can be found on gov.wales/a40-penblewin-redstone-cross-improvements-overview