Washington ? A faulty electronic circuit that caused a deadly Metro crash last summer was symptomatic of an “anemic safety culture” at the D.C. area’s transit agency, the National Transportation Safety Board said Tuesday.

Eight passengers and a train operator were killed in June 2009 when a Metrorail train rear-ended a second train stopped near the Fort Totten station on the city’s northeastern outskirts.

As expected, the NTSB concluded that the collision occurred because Metro’s automatic signal system failed to detect the stopped train. The approaching train continued to travel at 55 mph until the operator saw the train ahead of her. She pulled the emergency brake, but was still traveling at more than 40 mph at the moment of the collision.

More broadly, the NTSB said Metro ignored repeated warning signs and fostered a culture of indifference to chronic safety issues.