GRANDE PRAIRIE, Alberta — A 59-year-old man is dead after the loaded logging truck he was driving crossed the centre line and triggered a multi-vehicle crash that shut down Highway 40 south of Grovedale Sunday morning, Grande Prairie RCMP said. RCMP, emergency medical services and fire officials were called to the crash, with the Grande Prairie logging truck driver declared dead on scene and another person airlifted in serious condition to Edmonton via STARS air ambulance. RCMP later determined that four semi-trucks were involved in the collision. Police said investigators determined a northbound semi loaded with logs crossed the centre line and collided with a southbound semi that then struck an SUV. The truck loaded with logs then crashed into another semi-truck, with the load of logs spilling out over the highway. …Grande Prairie RCMP, with the assistance of a collision reconstructionist, continue to investigate.