The Platte County Sheriff's office identified the man as John P. Houdyshell, 30, of Leavenworth, Kan.
Authorities say the man fell from the I-435 overpass onto the shoulder of I-29 Thursday afternoon.
He was taken to a Kansas City area hospital for treatment, but later died.
Authorities are not sure if the fall was an accident or if it was intentional, but they say there were no signs of foul play.
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