The Verwood junction on the A31 westbound at Ringwood will be closed for two nights on March 2nd and 9th at 9pm till 6am.
One lane will also be closed on the approach for a week to allow for sign maintenance work to be carried out.
As a result, a diversion will be in place.
Anyone wanting to travel from the B3081 Ringwood Road (from Verwood) towards Bournemouth will need to join the A31 eastbound and turn around via the Ringwood junction.
To get to Verwood from Ringwood, motorists will need to continue to the A338 junction and head back towards the Verwood slip.