Slow Down TN: Tennessee Highway Safety Office working to stop speed-related crashes In the last five years, data from the Tennessee Highway Safety Office shows the largest number of fatal speeding crashes happened in 2020. Author: Yvonne Thomas Updated: 7:41 AM EDT April 26, 2021 TENNESSEE, USA — This month, you may see more law enforcement officers tracking your speed. The Tennessee Highway Safety Office is working to stop speed-related crashes. This campaign is about education and enforcement. In 2020, 165 people died in speed-related crashes. In the last five years, data from the Tennessee Highway Safety Office show the largest number of fatal speeding crashes happened in 2020.