Motorsport provides an opportunity to study human response under conditions of frequent crash exposure. This presentation provides a holistic overview of how NASCAR has advanced driver safety through a continuous cycle of crash investigation, data collection, and applied biomechanics research. The session will provide insights on how real-world impact data has informed meaningful improvements in driver protection and will discuss ongoing efforts to better understand and mitigate injury risks. Overall, this talk will show how evidence-based safety development in NASCAR can improve overall racing safety while also contributing broader insights into injury biomechanics and occupant protection.