Resurfacing on the A78 next to Fairlie Petrol Station has led to delays for motorists.
Two way traffic lights are in operation from 9.30am until 3.30pm from Tuesday until Thursday for 'remedial works'.
There are also two way traffic lights between Seamill and Carlung Farm lasting throughout this week until Friday for footway and signage works.
There will be a Stop/Go sign in operation on the trunk road through Wemyss Bay for 'blockage clearance' on Shore Road, outside Suzuki Garage on Thursday and Friday between 9.30am and 4pm.
Carriageway inspections are taking place throughout Tuesday on the A78 through Wemyss Bay.