Two people were taken to hospital after their cars collided in Newport Pagnell on Saturday.
Just after 1.30pm, a blue Volvo S80 and a silver Nissan Qashqui collided on North Crawley Road at the junction with Jenna Way.
The male driver of the Volvo suffered minor injuries and was taken to Milton Keynes General Hospital.
The female driver of the Nissan suffered serious chest injuries and was also taken to hospital where she remains in a stable condition.
Any witnesses can call police on 101.