Detectives are appealing for witnesses following a collision on the A10 in Enfield.
Police were called at 06:15hrs on Monday, 4 July to the A10 Great Cambridge Road to reports of a van and a car in collision.
The London Ambulance Service also attended.
The 20-year-old driver of the car was treated at the scene before being taken by LAS to hospital, where he remains in a serious but stable condition; his injuries are not believed to be life-threatening. His family have been informed.
The van driver was not injured in the collision.
Detectives from the Met’s Roads and Transport Policing Command are investigating.
Anyone with information is asked to contact the Serious Collision Investigation Unit’s dedicated witness line at Chadwell Heath Traffic Garage on 020 8587 4874 or via 101.