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Metrolink head-on crash in Chatsworth
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[QUOTE]Originally posted by rresor: [QB] With respect, Mr. Harris, Positive Train Control isn't just "a bigger and better babysitter". It's a totally different type of control philosophy than conventional block signals. Via the on-board computer, a dispatcher can authorize the train to proceed to a certain point and no farther. Back in the 1980s, Burlington Northern ran a PTC test for nearly three years in the Iron Range of Minnesota. As a test, an engineer was ordered to try to violate a movement authority. Under protest, as directed by a supervisor (with witnesses), he attempted to pass a red signal. The train was brought to a smooth "full service" stop by the computer. Further attempts by the engineer to release the brakes and move the train were futile. The technology works just fine. It isn't absolutely, totally "fail safe" -- nothing is -- but it works a whole lot better than cab signals without any enforcement at all. [/QB][/QUOTE]
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