Drivers have been warned to expect major disruption when drainage work begins next month.
The work will be carried out on the section of Turners Hill Road near Tulleys Farm, Crawley, starting on Monday, November 7.
The £40,000 West Sussex County Council scheme will involve installing new drainage pipes, road gullies and catch pits to prevent flooding from the fields on to the road. It will also help to reduce icy road conditions.
The scheme is scheduled to take up to five weeks to complete, weather permitting.
For the first two weeks of the scheme, part of Turners Hill Road will be closed to through traffic due to the narrow width of the road. A signed diversion route will be via B2110 Paddockhurst Road, B2036 Balcombe Road, then back onto Turners Hill Road via Crawley.
For the remaining three weeks of the scheme, temporary two-way traffic lights will be operation.
Work will be carried out Monday to Friday, and occasionally at weekends, from 8am to 5pm.