A Tygh Valley man died in a motor vehicle accident Thursday afternoon in south Wasco County.  According to the Oregon State Police, a car was traveling northbound on Highway 197 near milepost 44 when it began to turn into a driveway, and was a struck from behind for an unknown reason by a vehicle operated by 26-year-old Devan Lee Nelson.  The OSP says Nelson was declared deceased at the scene.  The driver of the car turning into the driveway, 31-year-old Nicholas Lawrence Mueller of Maupin, was not injured.  The highway was closed for about three-and-a-half hours during the on-scene investigation.  The OSP was assisted by the Wasco County Sheriff’s Department, Maupin Ambulance, and the Oregon Department of Transportation.