Paramedics from the Isle of Wight Ambulance Service are attending to the driver of the vehicle, believed to be an elderly female.
One appliance from the Isle of Wight Fire and Rescue Service is also in attendance at the scene alongside Police.
The road has been closed in both directions, with traffic being diverted via Perowne Way.
The road has now reopened.
UPDATE @ 13:15 – Temporary traffic lights have been installed to allow for SSE contractors to make the lamp post safe.
Traffic is delayed in the area.
Featured photograph: Chris Gardner