One person has been charged after a pickup truck and school bus were involved in a crash in Johnson County Friday morning.According to a report from the Tennessee Highway Patrol (THP), a Toyota Tacoma was driving south on U.S. Highway 421 Friday morning. At the same time, a Freightliner Thomas school bus was heading north on the highway.The THP reports the Toyota lost control going around a curve and went off the side of the road. According to the report, the truck overcorrected when it came back onto the highway and crossed the center line, hitting the bus head-on.