1·While the police report on the crash is incomplete, the investigating officer told the parents excessive speed, inexperience, and poor driving conditions appeared to be the key factors.
当时警方的肇事报告是不完整的，调查官告诉其父母：超速，驾驶不熟练，道路状况恶劣是关键因素。
2·A vehicle traveling data recorder can keep within limits of fatigue driving and excessive speed.
车辆行驶记录仪还可以起到遏止疲劳驾驶和防止车辆超速的作用。