Police have identified a Hilo man who died Sunday in a single-vehicle crash in Hilo as 30-year-old Palani B. Cobb-Adams. Police say alcohol may have been a factor in the crash. Cobb-Adams was driving a Toyota pickup truck west on Puainako Street when he crossed the center line just before 4:30 a.m. His truck then struck a street sign and an embankment. He was taken to Hilo Medical Center and pronounced dead an hour later. An autopsy will be conducted.