The scheme will involve drainage repairs in preparation for resurfacing in the new financial year. This will rectify any drainage issues in advance of the resurfacing programme.
The work will be completed on the A370 West Town Road, Backwell from Rodney Road to Cadogan Grove and will last until Wednesday 6 April.
Four-way temporary traffic signals will be in place 24 hours a day at the junction with Station Road, Dark Lane, West Town Road and Farleigh Road.
Cllr Mike Solomon, North Somerset Council's executive member with responsibility for roads, urged people to avoid the area if possible.
"This is an essential scheme that will ensure the road is in the best condition for resurfacing later in the year. We appreciate it will cause disruption and we would encourage people to stay away from the area if possible.
"If you don't need to travel through Backwell then please don't."
Anyone who has to travel through Backwell is asked to allow extra time.
For more information visit www.n-somerset.gov.uk/roadworks.