The surveys will take place in two phases: firstly between the A350 Roundhouse and A35 Bere Regis and secondly between B3072 Canford Bottom and A349 Merley Roundabout.
Guy Watts, Highways Agency Project Sponsor said:
We will be using specialist on-vehicle technology to allow us to assess the condition of the road and plan future maintenance work that will ensure that journeys remain safe.
We will need to close the A31 overnight in both directions to complete the surveys however we are carrying out the work in phases and overnight, when traffic flows are lowest, in order to minimise disruption. When the A31 is closed, road users will be able to continue their journeys by following a clearly signed diversion route.
The overnight survey of the A31 between the A350 and A35 will begin on Monday 10 March and finish in the morning of Thursday 13 March. A diversion will be in place via the A350, A35 and A31. The overnight survey of the A31 between the B3072 and A349 will take place overnight on Thursday 13 March with a diversion via the B3073, A348, A341 and A349. All survey work will be carried out between 10pm and 5am.
Members of the public should contact the Highways Agency Information Line on 0300 123 5000
Journalists should contact the Highways Agency press office on 0844 693 1448 and use the menu to speak to the most appropriate press officer