A section of the A737 between Highfield and the Den east of Dalry will close to all road users from Monday 30 July for approximately 5 weeks.
The closure will allow essential work to be carried out safely to construct the road which will, on completion of the project, connect the existing A737 to the new Dalry Bypass.
Local access only will be provided. A signed diversion route will be in place.
Transport Scotland and its Contractor, Farrans Roadbridge Joint Venture would like to apologise for any inconvenience caused.
A Transport Scotland spokesperson said:
“We anticipate that this could cause a minor delay to people’s journeys and would advise that you allow more time and plan your journey ahead.
"We would like to apologise for any inconvenience caused and thank the public for their patience and continued co-operation during this time."
On completion the A737 Dalry Bypass will encourage improved economic and employment opportunities through more reliable journey times for motorists and businesses along the length of the A737. In addition, the Dalry Bypass will help separate local and strategic traffic, leading to improved road safety.
Completion of the Dalry Bypass is expected by the end of 2019.