Motorists are being told to expect delays on Monday on the main Glenties to Dungloe road.
As part of the ongoing road improvement works on the N56 Letterilly section, a new temporary road will be opening for traffic.
This will be a one lane traffic system and traffic lights will be in operation. Pull in bays are in place to allow the areas for emergency services to pass through safety.
Delays are to be expected, please allow extra time for any journeys in the section of the N56.
Donegal County Council is also asking motorists to please obey the 50km/hr speed limit and weight restrictions on HGV of 8T/axle load are also in operation.