The next phase of work on the flood prevention project for the A32 Gosport Road between Farringdon and Chawton will start at the end of May.
Road resurfacing work will take place at the same time.
The first elements of the construction work will start on Tuesday, May 30 and they are expected to take up to three weeks to complete.
For this part of the scheme the A32 Gosport Road at Farringdon will be closed from Woodside Lane to Kitcombe Lane. A signed diversion will be in place.
The A32 will then be re-opened and the remaining works will then take place off the highway.
Cllr Nick Adams-King, Hampshire County Council’s executive lead member for universal services, said: “This package of road improvements will deliver the next phase of work to tackle flooding on the A32.
“To minimise delay and disruption to road users, Hampshire Highways will complete the road resurfacing at the same time.
“I’d like to thank residents and businesses for their patience as we undertake these essential works.”
Over the winter in 2013-14 the A32 at Lower Farringdon, parts of Chawton and the surrounding area were badly affected by flooding caused by a combination of rising ground and surface water.
Hampshire Highways has since installed a series of flood prevention measures including ditches, drains and soakaways, alongside other engineering work to reduce the risk of flooding.
The work starting in May is the next phase of this.
Farringdon businesses suffered reduced trade last summer when the first phase of the flood prevention project shut the A32 for 15 weeks.
For more details and scheme updates visit www.hants.gov.uk/farringdon For more details on the road closures visit https://one.network/?tm=GB133502600