A driver has died after his Peugeot car left the A43 Tiffield turn in Northants and overturned.
The vehicle also hit a silver Mercedes car in the incident, which happened on Tuesday evening about half a mile north of the Tiffield turn.
The motorist is believed to be a man in his sixties, but has not yet been formally identified.
The 32-year-old woman driver of the Mercedes was not hurt. Police are appealing for witnesses.