A Grundy County man has died following an accident Wednesday.  The crash occurred at 5:40 p.m., about two miles north of Trenton.  The Highway Patrol reports Derald Whitney, 71, suffered a medical emergency as he was northbound on Highway 65.  He traveled off the roadway, struck a sign, and came to rest in a ditch.  Investigators said Whitney was not injured as a result of the crash.  The Trenton man was taken to Wright Memorial Hospital where he later died.