A 59-year-old Lincoln man suffered a serious head injury when he crashed his motorcycle Friday morning.

Jack Rexilius was driving north on 84th Street near Havelock Avenue around 7:37 a.m. when the motorcycle struck a raised median near the east entrance to the ADM plant, said Officer Katie Flood. The bike landed on Rexilius, who was wearing a helmet.

Witnesses said Rexilius did not appear to be speeding, Flood said. Alcohol is not suspected to be a factor in the accident.

Rexilius remained in serious condition Friday night at BryanLGH Medical Center West.