A woman has been airlifted to hospital following a collision in Hertford Road.
The woman, reported to be in her 20s, was taken to Royal London Hospital by air ambulance following the collision at the junction of Hertford Road and Galliard Road in Edmonton.
The woman is said to be in a serious condition suffering from head and leg injuries.
The road is closed between Nightingale Road junction and the Cuckoo Hall Lane junction and traffic is building up in both directions.
Bus diversions are in operation for the 191, 279, 349 and 491 bus routes.