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Originally Posted by Shawnee123
You think there'd be a whole system in place for testing and calibration and errors and fixes...scary.
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From the Washington Post of 23 Oct 2009:
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Metro to test new software for crash-avoidance system
After a fatal Red Line crash in June, federal investigators said Metro's crash-avoidance system was inadequate and called for the agency to implement a real-time backup. …
Metro uses a software program to check for circuit malfunctions. Since the Red Line crash, those software checks have been run twice a day to look for anomalies. If problems are found, crews are sent to inspect the circuit; if necessary, adjustments are made on the spot.
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No problem! If a collision avoidance system fails, a program will discover it up to 12 hours later. IOW report why those two trains collided. 85% of all problems are directly traceable to top management. When management is technically dumb, then a protection system (that does not execute during the rush hour and only operates twice a day) is more than sufficient.
After all, trains don’t collide. When the collision avoidance system failed repeatedly previously, trains did not collide. Therefore don’t worry; be happy. What any management says when employees work for them.
Some believe the operator was at fault. Even that is often directly traceable to top management that did not provide the necessary atttitude and knowledge.