It’s been over two years since a Hickory Creek first-grader was struck and killed by a car as he was crossing the street to board his school bus in April 2009.As Warren County students prepare to return to school next Monday, Aug. 15, the Tennessee Highway Patrol wants bus safety to be on the minds of parents, students and motorists.National statistics show an average of 139 fatalities have occurred each year over the past decade in school transportation-related crashes, according to the National Highway Traffic Safety Administration. NHTSA reports approximately 21 students were killed while they were entering or exiting a bus in the U.S. last year.With school already under way in a number of counties and on the horizon in others, the Tennessee Highway Patrol will assist local law enforcement efforts with a back to school enforcement and education campaign focusing on traffic safety in and around the school zones. State troopers will target traffic violators, specifically those who speed in school zones and pass stopped school buses, as well as raise awareness on school safety in Tennessee.