A repair and maintenance programme is underway to improve a 50-mile stretch of road between Exeter and Bere Regis.
The project, between the A30 and A35, began on 11 April and is scheduled to finish on 23 April.
All work will take place between 8pm and 6am and diversions are in place.
The scheme involves carrying out repairs, resurfacing, and routine maintenance activities such as sign cleaning and road sweeping.
Highways England team leader Julian Strong said: "Once this package has been completed, it will ensure these sections of the A30 and A35 remain safe and reliable for many years to come."
(LM/JP)
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