North Riverside police are requesting the public’s help in obtaining more information on what caused a March 10 crash that severely injured a motorcyclist at Cermak Road and Desplaines Avenue.

At about 6 p.m., according to Police Chief Carlos Garcia, a sedan driven by a 58-year-old Forest Park man was turning left from eastbound Cermak Road to northbound Desplaines Avenue when it collided with the motorcycle, driven by a 21-year-old Elmhurst man.

The motorcyclist sustained what police called “severe life-threatening injuries” and was transported to Loyola University Medical Center. On March 12, police reported that the man was expected to survive. The driver of the sedan was transported to the hospital as a precaution, police said.

Investigators from the Major Crash Unit of the West Suburban Major Crimes Task Force (WESTAF) are assisting North Riverside police with the case. The preliminary investigation suggests that the speed of the motorcycle played a “significant” role in the crash, according to police, but investigators are trying to locate anyone who may have witnessed the crash.

Anyone with information about this incident is asked to call the North Riverside Police Department at 708-447-9191.