ADSL team investigated the incident on 27th September, 2011 where 31 students and 6 adults died in a tragic accident on the motor-way M-2 near Kalar-Kahar. ADSL conducted an engineering investigation on the accident in 2012. FEM analysis and coherent testing approach was developed by using LS-DYNA and LS-Pre-Post. And the vehicle was crash tested. It was found that the superstructure of the vehicle failed on 1.25 times its own weight on inversion. The vehicle did not meet FMVSS and ECE roof integrity standards by a large margin.