According to Dr. Gridlock today, the track circuit behind last month’s crash has apparently been failing to detect trains since a key component was replaced back in December of 2007. The NTSB also said that this component – a part of the WEE-Z bond – is the other end of the paired impedance bonds. The board had said previously it may have been the impedance bond at the other end of the circuit, the one that was replaced five days before the crash.
This new finding now begs the question of Metro: just how bad is their maintenance and trouble-shooting of the train protection system? And what, pray tell, will John “Baghdad Bob” Catoe, Jr. say next?
It’d better include the words “I’m sorry, DC.”