Works will take place over the weekend on the Wareham Bypass in the wake of a burst water main last week.
Temporary traffic lights will be in place on the A351, causing slower traffic, as Wessex Water works to make the road safe following last week's flooding on the road.
The work will go on from today, Thursday, until Monday, with temporary traffic lights in force from 6.30 am until 8 pm daily, Dorset County Council's roads team said.
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