BAKERSFIELD, Calif. (KGET) -- Southbound Highway 99 traffic is backed up after a semi-truck collided with a pick-up truck and overturned just south of California Avenue, according to the CHP Traffic Incident Information Page. A semi-truck hauling carrots and pick up collided in the center divider around 5:39 a.m., the page reported. The truck is overturned creating traffic delays across southbound lanes. The first and second lanes of southbound Highway 99 remain closed as environmental health officials clean up diesel and oil spilled from the collision. No injuries have been reported. Expect delays. This is a developing story. Check back for updates.