An accident on Interstate 65 North in Sumner County closed a portion of the roadway Tuesday afternoon. The accident involving a tractor trailer and a Nissan pickup was reported around 3:20 p.m. near mile marker 101 in an area of the interstate on a bridge.Reports indicate that the driver of the Nissan pickup, 29-year-old Michael Douglas, crossed into the lane of the tractor trailer. Both vehicles were travelling north at the time.The tractor trailer, driven by 55-year-old Roger Le Noue, struck the median, continued travelling northbound and then struck a beam causing it to become airborne.Le Noue's truck then flew across a gap and struck the southbound bridge of I-65, finally coming to rest in Williamson Road below the interstate.Le Noue was transported by LifeFlight to Vanderbilt University Medical Center. He remains in critical condition as of 5:30 p.m. Wednesday.Douglas was transported to an area hospital in Hendersonville. His condition is unknown.Another man, identified as Storm Bugg, was injured while trying to help the victims.He was taken to an area hospital and released Tuesday night.