Police are searching for a driver who reportedly left the scene of a two-vehicle crash on foot.
The collision, involving a white Seat Ibiza and a grey BMW 340i, happened just after 22:30 BST on Saturday near Sunderland.
The Seat overturned in the crash on the A690 northbound, near the junction with the A19 at the Herrington Interchange, injuring the driver.
Northumbria Police said the BMW driver was reported to have left the scene on foot and asked witnesses to get in touch.
The female driver of the Seat was taken to hospital but has since been discharged.