Troopers from the Michigan State Police Wayland Post are currently investigating a single vehicle traffic crash Saturday around 10:20 AM. The crash occurred on Deep Lake Road in Yankee Springs Township. The driver, a 30-year-old male from Grand Rapids, was driving east bound on Deep Lake Road when he lost control and struck a tree. The driver suffered serious injuries and was transported by Air Care to Bronson Hospital in Kalamazoo where he remains in serious condition. Preliminary investigation indicates that the crash was caused by speed. Alcohol and drugs do not appear to be a factor.