Hampshire Police have confirmed that three vehicles were involved in the incident at around 8.10am just past the junction with the A3057.
A white Peugeot panel van left the road and ended up down an embankment.
The driver of the van had to be freed by emergency services and has been taken to hospital by ambulance with injuries that are said to not be life threatening.
The other vehicles involved were a black Kia and an Iveco lorry.
Anyone who witnessed the incident or has information about it is asked to contact the Whitchurch Roads Policing unit on 101.
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