The 51³Ô¹ÏºÚÁÏ Division of Acute Care Surgery worked with the 51³Ô¹ÏºÚÁÏ Office of Traffic Safety to publish "" in the ​​​​​​Journal of Trauma and Acute Care Surgery. The study evaluated children who were hit by cars in Las Vegas and found that the risk of crash is higher on school days than non-school days, for both minor and major injuries, and that there is a noticeable increase immediately before and after school.