宾夕法尼亚州火车事故揭示了自动铁路制动系统在防止碰撞方面的无效性。 Pennsylvania train crash reveals ineffective automated railroad braking system in preventing collisions.

宾夕法尼亚州火车事故揭示了自动铁路制动系统的缺陷。 Pennsylvania train crash reveals shortcomings of automated railroad braking system. 美国国家运输安全委员会的初步报告指出，所描述的情况不会触发自动主动列车控制系统来停止列车，从而使其无法有效防止碰撞。 Preliminary report by National Transportation Safety Board states that circumstances described would not have triggered the automated positive train control system to stop trains, rendering it ineffective in preventing collisions. 系统旨在防止此类崩溃，但并未设计用于在某些情况下提供保护。 System designed to prevent such crashes but has not been designed to protect in certain situations.