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The Midwest Guardrail System (MGS) has been extensively deployed across North America to protect motorists from roadside obstacles during roadway departures. While it has undergone rigorous crash testing, certain impact scenarios exceed the MGS's redirective capacity, leading to system failure. Finite element analysis computer simulations are being used to better understand these limitations. Explore the MGS's performance under various impact conditions and with different test vehicles, receive valuable insights into its functional limits and discuss the implications for future safety improvements.