The M61 has been reopened near Preston after being closed due to a man falling from a bridge.
Lancashire Police were holding traffic between Junction 8 and Junction 9 of the motorway.
Police later confirmed the man, from Chorley, had died.
Dozens of police vehicles and an air ambulance attended.
A spokeswoman for the North West Ambulance Service said: “This is a police incident and it is still ongoing. We were called at 09.16am and have a number of resources at the scene.”
The incident took place around 9.30am near Walton Summit on Monday (10 September).
At 10.20am the southbound carriageway was reopened as the air ambulance left the scene.
The northbound carriageway remained closed until 11am.
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Diversions were put in place via the A6 and other routes – but police expect traffic to be heavy throughout Monday morning.
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