A car crashed into the central reservation of the M25 clockwise between Junction 19 and Junction 20 this morning.
Hertfordshire Constabulary was called to the scene, between the Watford junction and Kings Langley exit, at 9.38am following reports that the dark blue Mazda MPV had crashed.
The outside lane was blocked.
The car has been recovered and all lanes have since reopened.
It is believed that the female driver did not receive any injuries.
Traffic is still slow and there are tailbacks to Junction 17, Maple Cross.