Throughout January work will continue on finishing the roundabouts, final surfacing of the southern section of the road and white lining.
The road signs will also start to go up on the southern section between Littlemoor and Manor Roundabout.
Work is also ongoing on the park and ride, which will be open in the spring.
Unfortunately the extreme cold weather in December has delayed work and the main carriageway of the road is now scheduled to open in February.
Dorset County Council Head of Highways Andy Ackerman said:
“Residents have been waiting a long time for this scheme and it is unfortunate that the unusually cold weather in December has pushed the road opening back a month.
“Skanska has done a good job, but some things the construction industry doesn’t have control over.”
When the main carriageway is open, work will focus on completing the Bincombe junction and downgrading the old A354 between the hairpin bend and Ridgeway bridge to a bridleway and cycleway.
Plans are currently being finalised to use the park and ride buses to shuttle Broadwey residents to a connecting Dorchester bus service in Littlemoor.