Transport Scotland's operating company BEAR Scotland will carry out the project over three nights.
Tommy Deans, BEAR Scotland's South East Network Manager, said: "These surfacing improvements on the A720 between Dreghorn and Calder will address and repair defects in the road surface such as potholes and cracks, creating safer and smoother journeys for motorists.
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"It is essential for safety that we close the carriageway during these works, however we've scheduled them to be carried out primarily during overnight hours to minimise any disruption.
"We thank motorists in advance for their patience while our teams carry out these improvements."
For the safety of workers and road users, the westbound carriageway of the A720 will be closed between Dreghorn Junction and Calder Junction from 20:30 to 06:00 each night.
During these overnight closures, a diversion route for westbound traffic will be signposted from Dreghorn to Calder via Dreghorn Link, Redford Road, Colinton Road, Wester Hailes Road and Calder Road. This diversion is 4 miles long and will add an estimated 7 minutes to affected journeys.
Consultation has taken place with relevant stakeholders in advance of these works to make them aware of the traffic management arrangements and to minimise any inconvenience.
