Update: The 41A Bypass is back open to traffic as of 9 p.m. Friday.
______The Clarksville Police Department is investigating a serious head-on crash that shut down a major roadway late Friday afternoon.
Officers were called to the scene just before 5:20 p.m. in the 1500 block of Ashland City Road (41A Bypass), where two vehicles collided head-on. Police say at least one driver suffered critical injuries and was transported to Nashville by LifeFlight. Their condition has not yet been released…