One car left the road and came to rest at the bottom of a mud bank and firefighters from Uckfield and Crowborough worked together to remove the roof of the car, which was badly damaged, before helping paramedics to remove the driver.
Uckfield watch manager Ian Ritchie said the motorist’s injuries were “surprisingly minor”.
The second car remained on the road and its driver also received minor injuries.
The police said later that the cars were a silver Vauxhall Vectra, driven by a 27-year-old Crowborough woman, and a blue Mitsubishi Pajero, driven by a 30-year-old Uckifield woman.
It was the Vauxhall that left the road and went down a bank.
Police said both drivers suffered whiplash injuries and were treated at the Kent and Sussex Hospital, Pembury.
They added the road was closed to traffic in both directions while the incident was dealt with. The southbound carriageway re-opened at 12.10pm and the road fully re-opened at 1.12pm.
Mr Ritchie said a recent space of accidents coincided with rain which had made the roads very slippery.
He said that statistically Wealden’s roads see the highest number of ‘killed or seriously injured’ accidents in the county and, as a district, has the fifth highest number such incidents nationally.
Mr Ritchie said: “Drivers are urged to take extra care on the roads during wet weather by slowing down, leaving additional space between vehicles, using headlights and giving themselves extra time for their journey.”