巧了，前兩年我們這兒的地鐵事故也說是因為信號不好

2009-6-22，我們這兒一輛地鐵竟然爬到了另一輛靜止的地鐵上。原因如下;

A preliminary investigation found that after the June 17 replacement of a track circuit component at what became the site of the June 22 collision, signals had not been reliably reporting when that stretch of track was occupied by a train.

俺在GOOGLE的時候，發現09年我們這兒居然發生了兩起事故.太令人吃驚了。這裏可是首都啊，地鐵營運的曆史悠久，經驗豐富！

June 22, 2009 Washington Metro train collision,

November 29, 2009 Washington Metro train collision,