WAVELAND, Ind. (WOWO): Indiana Conservation Officers are investigating an off-road vehicle accident that happened in Southwestern Montgomery County Saturday morning. 46-year-old Robert Vosefski, of Waveland, rolled a Polaris Ranger on its side. Vosefski was taken to a local hospital for a non life-threatening head injury. Officers say markings in the gravel driveway at the scene show speed was a factor in the accident. Vosefski was not wearing any protective clothing or a helmet at the time of the accident. It is unknown at this time if the safety belt was in use at the time of the accident.