An overturned trailer caused a traffic backup on the westbound lanes of Highway 58 in Central Bakersfield Monday night. The crash happened just before 10 p.m. just west of Union Avenue. According to the CHP Traffic Incident Information Page, the semi truck collided into a wall and lost its trailer in the First lane, blocking traffic. The semi ended up on the right hand side of the highway. CHP reported only minor injuries for those involved in the crash.