Holt Road in Holt is closed Monday and Tuesday this week from outside The Willows to BroadBridge in both directions.
The closure is a distance of approximately 350 metres just after the Cross Keys Inn and a diversion is in place via Lower Row and Pond Head.
The road starts at Three Legged Cross and heads towards Holt, Furzehill and Wimborne. It is one of the routes used when travelling from Verwood to Wimborne.
Whilst the closure order is in place till Tuesday at 3.30pm, Openreach hopes the work will be completed by the end of today.