From Monday 24 March, work will be carried out on the £9.2m project.
It will continue for five nights until Friday 28 March.
To allow the work to be undertake efficiently and safely, contractor McLaughlin & Harvey will close the road between 10pm and 6am each night.
The A82 will be closed at Pulpit Rock, south of Ardlui, but will remain open on either side of the closure. Diversion routes will be in place and are as follows:
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• Northbound via the A83 at Tarbet, A819 and A85
• Southbound via the A85 at Tyndrum, A819 and A83.
Dominic Murphy, Transport Scotland Project Manager, said: "While we have tried to minimise the number of overnight closures, they are necessary to ensure the safety of road users and road workers while critical works are underway.
"Transport Scotland continues to work closely with the contractor to implement an innovative approach to this construction project. This will allow us to keep the road open each day and to minimise disruption to road users.
"We would like to thank the local community and road users for their continued patience during these works."
(JP/IT)
