Part of the M20 will be closed overnight after police found a body on the road.
Officers were called at 6.05pm on Tuesday to the London-bound carriageway between junctions 10 and nine near Ashford.
A body was found on the road and the person was pronounced dead at the scene, Kent Police said on Tuesday night.
The death is being treated as unexplained and the force is appealing for anyone who saw a pedestrian in the area to come forward.
That part of the road will remain closed overnight while the scene is investigated.
Pictures circulated online showed long queues of traffic at a standstill and Highways England told people to remain in their vehicles until police officers directed them to turn around.
Some took to Twitter to vent their anger after claiming drivers were parking in the hard shoulder and blocking emergency services from getting past.
Anyone with information should call the Kent Police serious collision investigation unit on 01622 798538 quoting 20-0913.