The clockwise M25 was closed in Kent after a fuel tanker caught fire during the morning rush hour.
The driver dialled 999 to report the cab of his vehicle was on fire, just after 05:00 BST, on the slip road leading to Clacket Lane, between Junction 5 for Sevenoaks and Junction 6 for Limpsfield in Surrey.
Kent fire crews used jets and foam to put out the fire and stayed at the scene to continue to cool the tanker.
Highways England tweeted a picture of the burnt-out lorry, which was later recovered.
Traffic in the area was delayed but has returned to normal, according to Traffic England.