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Traffic was held on the M20 after reports of a distressed man near Junction 10 at Ashford.
Police were called just before 4pm today, and officers located the man, who was then handed into the care of medical professionals.
Kent Police says traffic was held to ensure public safety and had been released about 30 minutes later.
A police spokesman said: "Officers were called at 3.59pm on Saturday to a report of a distressed man near junction 10 of the M20.
"Officers attended and located the man, who is safe and will be handed into the care of medical professionals.
"Traffic was held to ensure public safety and had been released by around 4.30pm."