Police had to close the M6 in both directions after concern for the welfare of a teenage boy.
Officers were originally called to an address in Penrith at about 8.50pm, following concerns for the teenager.
At 11pm yesterday, police closed the motorway at junction 40.
A police spokesman has confirmed it was shut for a short time for the safety of the drivers on the M6, while officers dealt with an incident on the bridge.
He added: "The young male was spoken to by specialist negotiators and later safely taken to hospital to be assessed."
Motorists were diverted via the exit and entry slip roads.
A witness said there were tailbacks from Junction 41 to 40 at Skirsgill M6 J40 and emergency services including police, fire and ambulances had attended and that traffic was being diverted through Penrith.
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